I’m 25 (m) have been experiencing health anxiety for almost 7 years now. 
My constant fears are about my heart.
Mainly due to my symptoms, 

Heart palpitations, vary from; skipped beats, painful beats in chest and neck, breath sucked from my chest with feeling of pause in pulse, slow heart rate when I sit or lay down.

Also, Chest pains, dizziness, depersonalisation, derealisation, pains and aches. 

I have a hard time accepting its health anxiety, I’ve gone through ECGs, 24hr Holter (Came back with bradycardia and sinus arrhythmia but was noted on my results as not a serious arrhythmia and no need for extra investigations) &amp; Echo. All of which are apparently fine. 

I’m convinced they’re missing something. My everyday life is tormented, I’m struggling daily and feel so lost. My worse fear is death but I’m feeling like the only escape is suic*de. 

I’m writing this in the hopes of finding someone like me. I feel so alone in the world and like no one understands me.