Heart murmur??

Honestly, my anxiety has gone much better over the past few weeks. 3 weeks ago, I couldnt take a shower without thinking I would go into cardiac arrest, I couldnt go for a walk without thinking i would go into cardiac arrest, I couldnt even sleep! However, through pushing my anxious mind through exercise, I can say that I can take showers normally, can go for walks and runs with minimal anxiety (which I understand is a long term process to get better), and I can sleep more now. After jumping on my trampoline yesterday, I felt my heartbeat (it's a addiction) but when I felt it, I swear to god it was murmuring like crazy. Every beat was making this shhhushhing sound with the beat. I had an adrenaline rush, ran inside to my mom to tell her to feel my heart she said it was fine, so when I felt it, it went back to normal!!!! I dont know what that was! Back in January when I went to my second pediatric cardiologist, one of the assistant cardiologists to the actual doctor felt my heart and said there was a murmur, but that soo many young adults have them and it's nothing to worry about. No other doctor has mentioned a murmur except her. So im just scared I might have some valve defect and then Im gonna have a heart failure and die or I have some type of cardiomyopathy!!! Ive been to many doctors, done more EKG's than most people have. I think like.. 6 actual EKG's, one echo in august, and one stress test, plus 4 week moniter, holter too. So yeah. Listen, I might be blowing things out of proportion, but even the doctor said I might have innapropriate sinus tachycardia or SVT, because my heart beats faster than normal for my age. Im just scared while Im playing sports I will drop dead like famous athletes have. And I cant get my mind off the murmur. I get panic attacks during exercise, well thats what my parents say, but I still think its either some sign that my heart is failing, or something like SVT. Im sorry for such a long post, I just need some feedback. Thanks

If I can give any reassurance, I’d say your heart is fine. You are just hypersensitive to every beat and feeling. Keep doing the fun things you like doing. This is coming from me who recently dealt with the same, but once i got further testing, i let it go.