I thought I Was Having a Heart Attack... Nope. Just Anxiety.

It starts innocently enough. A twinge in the chest. Nothing dramatic. Just a little something where something shouldn't be. And then your heart does that thing—that slightly-too-fast, slightly-too-hard thumping that makes you suddenly very aware that you have a heart at all, which is never a comforting realisation.

And then your brain, helpful as ever, pipes up.

"That's it. That's the one. This is the heart attack. I knew it. I knew we shouldn't have had that second biscuit. Call the ambulance. No, don't call the ambulance—you'll look stupid if it's nothing. But what if it's NOT nothing? What if this is how it ends? In the living room. In your slippers. With last night's washing up still in the sink."

And suddenly you're off. The racing heart becomes proof of impending doom. The tight chest becomes evidence of cardiac catastrophe. The tingling fingers, the light-headedness, the overwhelming urge to either run or collapse—all of it feeding the story your brain is now writing at breakneck speed: We are dying. Right now. This is happening.

Reader, I have been there. In A&E. At midnight. With a cannula in my arm and ECG stickers all over my chest, convinced this was finally The Big One. The one I'd been half-expecting for years. The dramatic exit my anxiety had been rehearsing in my head since I was old enough to know what a heart attack was.

Spoiler alert: It wasn't a heart attack. It was a panic attack. A really, really convincing one. The kind that doesn't just whisper "what if?" but stands on a table in the middle of your nervous system and screams it through a megaphone.

So let's talk about it. Because if you've been there too—or if you're there right now, reading this with one eye on your chest and one ear tuned to your heartbeat—I want you to know something: You're not dying. You're just having a very loud, very physical, utterly exhausting panic attack. And you're going to be okay.

Panic Attacks: The Body's West End Production of "Impending Doom"

Here's what nobody tells you about panic attacks: they feel physical. Properly physical. Not "a bit anxious" physical. Not "nervous before a presentation" physical. We're talking chest pain, arm numbness, shortness of breath, sweating, shaking, nausea, and that peculiar sensation of being slightly outside your own body, watching yourself panic from a distance while also being very much in the panic.

It's a full-body experience. And it is convincing.

The first time it happened to me properly—the A&E time—I was absolutely certain. This wasn't anxiety. I knew anxiety. Anxiety was worrying about things that might happen. Anxiety was lying awake at 3am replaying conversations from 2006. Anxiety was not this. This was my heart. My actual, physical, beating heart. And it was clearly packing it in.

I did the thing you're not supposed to do. I Googled "heart attack symptoms in women." And Google, unhelpful as always, said things like "jaw pain" and "feeling of impending doom." Well. My jaw did hurt a bit, now that I thought about it. And I definitely felt doomed. So that was it, then. Confirmed. I was having a heart attack, and Dr Google had signed off on it.

The paramedics were lovely. The A&E staff were lovely. The ECG machine was beepy and clinical and utterly indifferent to my internal drama. And after several hours, some blood tests, and a very patient doctor explaining that my heart was—and I quote—"absolutely fine, actually," I was sent home with a leaflet about anxiety and a sense of profound anticlimax.

The panic attack had been a full-on production. Costumes, lighting, special effects. My nervous system had taken on the role of diva, and it had committed.

Your Brain Is Doing Its Job. Just... At the Wrong Time.

Here's the science bit. I'll keep it brief because frankly when I'm panicking I don't want a biology lesson, I want someone to tell me I'm not actively dying.

Your brain has a built-in alarm system. It's called the sympathetic nervous system—the "fight or flight" response. It evolved to keep you alive when faced with actual physical threats. Sabre-toothed tiger. Angry bear. That sort of thing.

When the alarm goes off, your body floods with adrenaline. Your heart rate increases (to pump blood to your muscles so you can run). Your breathing quickens (to get more oxygen in). Your senses sharpen. Blood diverts away from non-essential functions (digestion, rational thought) and towards survival. You are primed. Ready. A lean, mean, tiger-fighting machine.

The problem is, there is no tiger.

There's just you. Sitting on the sofa. Watching Bake Off. And your brain has decided, for reasons it's not legally obligated to explain, that now is the time to sound the alarm. Full volume. All stations. This is not a drill.

So your body does exactly what it's designed to do. It prepares for mortal danger. And because there's no actual danger present—no tiger to run from, no bear to fight—all that adrenaline just... swirls around. Making your heart race. Making your chest tight. Making you feel like you're about to die, because your body is acting like you are about to die, and your brain is desperately trying to find a reason why.

That's a panic attack. A false alarm. A fire drill when there's no fire. Your nervous system doing its job perfectly, just at a wildly inappropriate moment.

Panic Attack or Heart Attack? (The Question We All Ask While Googling at 2am)

Let's address the elephant in the room—or rather, the elephant sitting on your chest.

Can you tell the difference between a panic attack and a heart attack in the moment? Honestly? Not always. The symptoms overlap so much that even medical professionals sometimes struggle to distinguish them without an ECG. Chest pain. Shortness of breath. Sweating. Nausea. Radiating discomfort. All of it can happen in both.

So I'm not going to sit here and tell you "just know the difference." That's not helpful. If you're genuinely concerned, if something feels wrong in a way that's new or different, get it checked. The nice people at 111 or 999 would rather you called and it was "just" anxiety than you didn't call and it wasn't.

What I can tell you is this: if you've been through this before—if you've had the ECG, if you've been told your heart is fine, if you recognise this particular flavour of terror—then there are things you can do in the moment to help your nervous system stand down.

What Helps (When Your Brain Is Screaming That Nothing Will Help)

Grounding

Your brain is currently living in the future. A terrible, catastrophic future where everything has gone wrong. Grounding brings it back to the present. To the room. To the floor under your feet.

Try this: Name five things you can see. Say them out loud or in your head. "Lamp. Curtain. Mug with a chip in it. My own hand. The cat, who is completely unbothered by my crisis." Then four things you can touch. Three things you can hear. Two things you can smell. One thing you can taste.

It's not magic. It won't stop the panic instantly. But it gives your brain something else to do. Something real. Something now.

Slow Breathing (But Not Too Deep)

The classic advice is "take a deep breath." And I understand why people say it. But when you're panicking, you're probably already over-breathing. Too much oxygen, not enough carbon dioxide. Taking a massive gulp of air can actually make the dizziness and tingling worse.

Try this instead: Box breathing. It's called box breathing because you're making a square. Equal sides. Equal counts.

• Inhale gently through your nose: 1... 2... 3... 4
• Hold it: 1... 2... 3... 4
• Exhale slowly through your mouth: 1... 2... 3... 4
• Hold again: 1... 2... 3... 4

Repeat. Four or five times. Then let your breathing do whatever it wants. The point isn't to control it perfectly. The point is to signal to your nervous system that the emergency is over. "Look," you're saying to your body, "I'm breathing slowly. I'm not running. There's no tiger. You can stand down now."

Being With Someone Supportive

If there's someone you trust nearby—a partner, a friend, a flatmate, a neighbour who doesn't mind you turning up at their door looking slightly wild-eyed—let them know what's happening. You don't have to explain everything. "I'm having a panic attack. Can I just sit here for a bit?" is enough.

What helps from them:

• Quiet presence. Not too many questions. Not too much fuss.
• Reassurance that you're safe. "You're okay. I'm here. This will pass."
• A distraction, if you want one. A stupid story. A mundane question. "What shall we have for tea later?" Something that anchors you in normal life.

What doesn't help:

• "Just calm down." (If I could just calm down, Sharon, I would have done it by now.)
• "What's wrong?" (Everything and nothing. I don't know. That's the problem.)
• "You're fine." (I don't feel fine. My body is telling me I'm dying. Please don't dismiss that, even if it's technically true.)

Takeaways (Or: What I Wish Someone Had Told Me in That A&E Waiting Room)

Your Symptoms Are Real. Your Fear Is Real. You Are Not Overreacting.

Let me say this clearly, because I needed to hear it and maybe you do too: A panic attack is not "just" anxiety. It is not being dramatic. It is not overreacting. Your body is producing real, measurable physical symptoms in response to a real, measurable chemical flood. The fact that the trigger was internal rather than external doesn't make the experience any less valid.

You felt what you felt. It was awful. It was real. And you survived it.

Box Breathing: Keep It In Your Back Pocket

I've already explained it above, but here it is again as a quick-reference thing you can screenshot:

Inhale 4 → Hold 4 → Exhale 4 → Hold 4

Do it while waiting for the kettle to boil. Do it in the queue at the post office. Do it in the middle of the night when you wake up with your heart already racing. It's small. It's portable. It doesn't require any equipment or an internet connection. It's just a little circuit-breaker for your nervous system.

If Anxiety Burned Calories, I'd Look Like I'd Just Run a Marathon

I have to find the humour in it. I have to. Because otherwise it's just... a lot. And if I can't laugh at the absurdity of my own brain convincing me I'm having a cardiac event because I had a slightly stressful email, then what's the point?

So yes. If anxiety burned calories, I'd be absolutely ripped. I'd have the physique of an Olympic athlete. I'd be writing this from the podium, accepting a gold medal in "Catastrophic Thinking" while my heart rate monitor beeped approvingly.

Sadly, it doesn't. I'm just tired and my chest hurts and I've wasted another perfectly good evening on a crisis that wasn't.

But I'm still here. And so are you. And that's not nothing.

A Final Word (From Someone Who's Been There)

If you're reading this because you've just had a panic attack—or you're in the middle of one, scanning desperately for something, anything, to make it stop—here's what I want you to know:

This will pass. It always does. It might take twenty minutes. It might take an hour. It might leave you feeling wrung out and exhausted and slightly embarrassed. But it will pass.

Your heart is fine. Your body is doing its job. Your brain is just a bit overenthusiastic. A bit dramatic. A bit extra.

You are not dying. You are not broken. You are a human being with a nervous system that sometimes mistakes a quiet Tuesday evening for a sabre-toothed tiger attack. It happens. It's happened to me more times than I can count.

And every single time, I've come out the other side. Wobbly. Tired. Desperate for a cup of tea and a lie-down. But here.

You will too.

Anxiously Ever After is written by me, Jennie, a 50-something-year-old woman with lifelong anxiety, diagnosed GAD, and currently navigating the wonderful world of late-diagnosis waiting lists. I write about panic, neurodivergence, and the general chaos of being human with warmth, honesty, and as much humour as I can locate in the moment.