Hi, I was reading the posts here and I'm hoping this is what I have. Do you think it may be anxiety? I'm only 24 and have no known heart problems. Quite a few months ago I decided to take a weight-loss product with ephedrine. Well, I had heard that lots of people had a heart attack with it, so I was very scared taking it. And once I took the pill I started feeling stuff almost right away. I didn't know if it was just psychological because of being scared, to I just tried to not think about how my heart felt and tried to ignore it. Well, after 3 days I was too scared because of what I felt, so I quit. It happens very sporadically throughout the day, sometimes for 1 second, sometimes up to 5 or so seconds and I can feel it when my heart beats. It happens at rest. It feels like a pressure or pain (I'm not sure if it really hurts or not, but it's definitely not a good thing). So, a while after I stopped taking it the symptoms went away. So a few months later I decided to try a differnt product with the ephedrine. Same thing happened, so I stopped. Only this time those heart feelings kept up for about 5 months. I was really starting to thing it messed up my heart. Well, finally they stopped. Well, then I heard about Xenadrine EFX that has no ephedrine, it has green tea instead. So, I started taking them and felt nothing. Well, about 3 days later I found some post at this site saying that the bitter orange in it acts the same way that ephedrine does, which scared me. And within a half hour I started feeling those aweful things again. It seems so psychologiical, but yet what if I have a heart problem that maybe this stuff aggravates? I don't have health insurance and I don't want to spend hundreds getting tests if everything is fine. Do you think it maybe is anxiety? Sorry I rambled for so long.