I'm 19, 5 foot 9, 230, and I've been having a suspitious feeling over and around my heart. It is like a sliget tightness on the lower inside of my breast, right over the heart, and sometimes I'll get a sharp pain under my left arm, about leval with the heart, maybe a little lower. Also, at times I can feel my heart beeting in my chest, and my neck and my head, usualy when I'm laying down. I also have at time bad cases of heartburn, although usualy when I have an empty stomach. I know that at my last appointment with the Dr, my blood pressure was up a little bit, but nothing too bad. I have put on more weight since then though, and I have a pretty poor diet, almost no vegiez or fruits, although I'm trying to change that now, and I don't excersize. Also, I have been on aderall since I was 7 for ADHD, but I stopped for almost the past year because I didn't think I needed it. Now when I take it, it makes my heart pound more, and the tightness seems more prevolent. What is this Tightness over my heart and is it something I should be concerned about?