I am 16, male, and alight smoker (3-6 a day) for about 7 months. Recently I have been having chest pain on my left side, it almost feels as if it is muscle pain, and it kind of moves from my back to over my heart. The pain began after I took a fall on my skateboard, on my left side, the fall wasn't serious, but the next morning, my chest hurt on the left side from taking deep breaths and moving my back or left arm. Two days after the pain began it still hurts on and off, but no where near as painful. I do not what is causing this pain smoking or the fall. If anyone could ell me whats going on it would be very helpful as i am nervous about this pain.