okay so i get these chest pains very often. and i've been getting them. atleast once a day i feel it... but i feel it on my left side only... like its the heart. it kinda pinches... i denno how to describe it. can't be heartburn cause i'm only 17? ... high cholestoral? i denno what it is... i got it checked out and they said it wasn't a heart murmur and that it was beating fine. .. my dad thinks its cause i strained that side from working out.. since my left side is my weaker side.. and its just hurting like that. but why does it only happen on my left side? and i keep feeling like its my heart. anybody know what's going on? anybody feel this before? kno what it can be? your help would be very much appreciated! thank you !