I have also experienced my share of fear of some sort of cardiac event. Luckily I have pushed past it! Here is the catch I'm only 16, so it is even more unheard of. I went through a series of doubt after I had an EKG, electrocardiogram, and blood tests. I seriously thought they had missed something. Then one day I said I'm done with this fear and looked at the facts. NOTHING abnormal showed up on any test! I'm only 16 so the likelihood of it happening is very very slim.
Tips that I have for you
1. DO NOT GOOGLE ANYTHING MEDICAL- as most people would tell you, this WILL just make any anxiety you have worse!
2. TRUST YOUR DOCTOR- if they don't see any reason for you to worry about something, then don't worry. My mom told me this "Worry is like a rocking chair, it gives you something to do, but it gets you nowhere!"
3. FIND DISTRACTIONS- If you are anything like me, when you are bored your anxiety strikes. So I have learned to find distractions. I will play Xbox, read, go exercise, etc. What I am telling you is to find SOMETHING to do. If it is the last thing you want to do, but your other choice is to be bored, DO IT. Boredom and anxiety DO NOT MIX
MSG me if you have any questions!!