Hi, I'm a 25yr old female with no major problems other than GERD,mild mvp, and occasional pac's. However, today, I was laying on my left side and I guess I had my fist up against my chest(I guess because I was cold or something), anyways all of a sudden I could feel what felt like it beating irregularly and fast. I was in total shock so I sat up and felt it again, and it was totally normal. I mean, it's hard for me to just go off of that since I wasn't sitting there feeling it with my palm or listening with a stethoscope so I don't know exactly how accurate it was. Should I be concerened? I've checked it several times since then and it's normal. Plus, when it was supposedly beating funny, I didn't even feel it like I feel the pac's. I wasn't light headed or sob. I have severe anxiety disorder and I'm sooo stressed now. Please give me some advice. Thanks, Brandi