Rough week HELLLLLLPPPPPPP

Ugh.. I've had a terrible week with anxiety and it's driving me insane. The problem is, if I could only convince myself that is is 100% just anxiety, I'd be fine.

I had an irregular heart rhythm last week for about 5 hours and it sent me into a full blown panic attack. I tried to calm myself but it wasn't working. I finally decided to go to the hospital to get it checked and before I got there it went back to normal. I decided not to even go in because hospitals scare me so bad.
I've spent the whole week recovering from my panic, exhausted and sick with diarrhea and worry.

But finally today I felt like I was coming out of it and then boom! It's back... i just had to check my pulse and it's a 62.... it's NEVER been that low.. usually high! Usually a 90 for me. So naturally I panic.. and even a panic doesn't bring it above 75.. what the hell is happening??
I'm having no pains or dizziness ot anything...
What could it be??
Could I have had a heart attack a week ago and not known it?
Im 27 years old with a poor diet but in relatively good shape. Could i have a heart problem because of my diet??
So many thoughts go through my head I wish I could stop them!!

I was checked about 4 years ago for chest pains with ecg blood tests, stress test, the works and told it was just stress. Could they gave missed something or is it possible that I was fine then but developed something since??

Help me stop these feelings pleaaassseeee!!!

If it helps mine also runs low at times, and for some reason seems to lower a bit during my anxiety peaks, like 60-75 range

Thanks for the replys.
I know I was medically checked but it was 4 years ago so my anxiety makes me wonder if things could have gotten worse since then. It's so terrifying to feel like you're heart is going to stop. I just want to lay in bed forever. :(

Hi Ram! I'm sorry it took so long for me to see your post when you've been so helpful to me. Here's something I've learned that I think is relative. Some of us with anxiety are overly aware of how our body feels or functions. Some people may notice their HR is low or fast or may feel nervous in the stomach but give it no attention. However, some of us with anxiety notice these symptoms and go full throttle into anxiety. I'm trying to teach myself to not be so hyper-aware of my body and just be. Easier said than done but something to work on! At least, it is for me. This journey with anxiety is just that--a journey. Not always a fun one but with every anxious moment, hopefully you learn you're stronger than you think and can cope better in the future.

Hope today is a better one for you!