Hello

my name is mason. I'm 23. And a few months ago I started having troubling heart proablems. I would be working and doing a bit heavy lifting and my heart would jus start pounding out of my chest feeling veery abnormal. I would panic and little. Eventually it has got worse. Along with more worry. When I get up and say pick up my room. My heart will jus start pounding very hard. And fast. I have been a year round athlete my whole life. It has been 4 months now and I cannot exercise or barely walk up stairs without my heart pounding very hard. 

I have been under extreme amounts of stress but mostly from thinking i have heart problems. I have been to the E.R and got an ekg it was fine. But still when I get up and trying moving around and doing things my heart beats very abnormal and hard. Any suggestions or thoughts will be appreciated. Thank you.