i am 17, im not on any medication, im 6'4, aprox. 180 pounds, 12% body fat, blood pressure is 123, 61. Recently i have had occasional pains in the left side of my chest near my heart. I don't know what it could be. I thought it might be an air bubble in my lungs but im not sure. It fist happened in the right side of my chest so i don't think it's a heart problem. This has been going on for at least to months and im not sure what it is. It hasn;t been in the right side of my chest for a while and is mostly in the left. would you know whats wrong?