I'm trying not to make this a pointless, waste-of-bandwidth post. I posted this here because I know that many intelligent people frequent this board, and possibly doctors. Somebody who could offer me some advice on this, because I'm somewhat worried this could be leading up to my death Now, for the past week, my heart has been hurting. It hurts on and off. It hurts especially on the right side, near where my right pec begins. It aches for hours. Every day it's been building just a little in intensity. Today it almost reached a stabbing sort of pain. Until today it's just been annoying but today it was actually painful. Today I mowed my neighbor's lawn and while I was going up my slope of a driveway I actually got out of breath! Now I am a very skinny guy(18.2 BMI, 135 pounds at 5'11) and I pride myself in my body. I have a ridiculously fast metabolism, and as such I can hardly gain(read:very, very long time for any achievement) any strength or stamina no matter how much I work out. However, I shouldn't get out of breath from walking up a 30 yard hill! I'm in good shape and I'm at the prime of my life(I'm 18). I feel like something is seriously wrong. Does anybody have any conclusions? I talked to my doctor about this before(a year ago) when I was feeling the same thing, although on a much milder scale. He wasn't worried at all and said it's probably just growing pains. The only conclusions that I can make from this are: 1) I've clogged my arteries somehow. Highly unlikely, although I was seriously overweight for a period of about 4 years, and I eat a lot of saturated fat from nuts. Two or three helpings a day from nuts. Althoug hI don't gain weight from this and it's pretty much the only fat I get--I couldn't have clogged my arteries in 18 short years no matter how much saturated fat I get, right? 2) It really is just growing pains. I've been growing again lately, seems like I'll never stop 3) I have some sort of heart condition. Also not likely because my family doesn't have a history of this. Any opinions? EDIT: I forgot to mention. I am a vegetarian, and I also monitor my protein intake very, very carefully. I definately get enough. And I exercise regularly. In fact, when I was losing weight, I rode my bike for 2 hours a day nonstop. That should have taken care of my arteries, shouldn't it?