I cannot shift this anxiety. If that's what it is. I'm convinced something is wrong with my heart. All day I'm in pain, get tight chest. Burning chest. Pains in arms, the pain feels internal, external. One thing I've noticed is I can definitely feel my pec in my left side bur not my right? Is that to do with tensing. I can't beat this. It's way on top of me. I'm constantly checking my chest for a beat and worrying why it's bEating faster, slower, harder, faster, does exertion make the beat faster and harder? It feels different to when I'm relaxing. Well trying to relax anyway. How can I have so many issues but be alive again the next day. It's killing me, if not physically then mentally for sure.