Hi, I'm 21 years old, and I'm fit, active, and in pretty good shape. Last week, usually in the evening hours, I would get a really sharp pain in my chest lasting around 30 seconds. It felt as though someone stabbed me and was twisting, I had to stop what I was doing, stop breathing and calm myself in order to try to relax until it went away. I had this problem probably 4 days in a row, and now this week, every time I bend over I get an immediate sharp pain in my heart region and I have to become erect as quick as possible. Is this my health, or what could the problem be, I'm starting to become highly concerned. Thanks for any help you can probide! (Also, I'm 5'2'', 140lbs, 21yrs, and no medicaly problems except IBS)