(Please dont take offence to the tone of this post, I mean it with pure LOVE)
I will just say this...
WE AINT DEAD.
We had the "symptoms". We survived.
How much else could we have done in that time?
If I had invested the 4 years of worrying about my heart into exercising I would have the best body right now! Or I could be a great piano player, lol...
Life IS going to move on anyway. Every single person on this forum (god forbid something outside of phyiscal health happens) will be alive for a long time still. WE'RE ALIVE.
It's best to enjoy the time you have.
Think of these scenarios...
1) For the next 20 years you worry EVERY SECOND OF EVERY DAY. You live anyway. What a sad waste of time.
2) For the next 20 years you worry EVERY SECOND OF EVERY DAY. You were right and you die of a heart condition suddenly. What a sad waste of the last 20 years that you could have enjoyed by living freely and having fun.
and then...
3) For the next 20 years you have loads of fun and live life to the max. You live anyway. What a great time.
4) For the next 20 years you have loads of fun and live life to the max. You were right and you die suddenly of a heart condition. What a great time.
You see, whether you are sick or not (and this is just false, because none of you actually are sick) you only win by just having fun and enjoying life.
NONE OF YOU ARE GOING TO DIE ANY TIME SOON (GOD FORBID SOMETHING OUTSIDE OF YOUR BODY HAPPENS). I AM PAST MY ANXIETY NOW AND YOU ARE ALL *EXACTLY* THE WAY I WAS.
Let yourself believe it. No ironic force is going to pop up and say "WELL, SINCE YOURE SO COCKY ABOUT NOT HAVING A HEART ATTACK, IM GONNA LAY ONE ON THICK!!! ALAKAZAAAAM!!!". Sorry for the joke, but it's nice to have humour around here

Try this experiment...
Tell yourself right now in your head "I WILL NOT DIE TODAY, I DONT HAVE HEART PROBLEMS AND I WONT HAVE A HEART ATTACK".
It will be scary, after the first couple of seconds (if youre anything like me) your mind will say "OK OK IM SORRY, I DONT KNOW THAT, PLEASE, I DIDNT MEAN IT. SPARE MY LIFE! HONESTLY, I MAY OR MAY NOT...IM NOT BEING COCKY, I APPRECIATE MY LIFE..."
And then do the same tomorrow.
And the next day.
Soon you will realise that whatever THOUGHTS were going on in your head, the reality is that you didn't die.
To the people who have had anxiety for decades...the first day you got the anxiety you thought you would die then and there. That was DECADES AGO and youre still alive!! You have spent decades in false beliefs. Doesn't that show you whats causing the problems?
I thought for SURE, no....i KNEW for sure I was going to die for years ago. Right there and then. 100% I was convinced. And many other times.
Guess what...
I AINT DEAD.
Anxiety is very complicated. But it's also very simple.
The complexity of it is that it is SO simple that we can't accept that it is. We want it to be complicated.
I love you all and I feel your pain. I'm glad to say that you are all fine and healthy. I would even place a large bet on the fact that noone on this forum will die from heart related problems for the next 20-30 years.
Bless all your (perfectly functioning and lovely) hearts, and good health.