Well, I was outside just playing some basketball for maybe 30 minutes or an hour, I didn't drink any water while I was playing and I didn't take a break, I just finished and came in. And as soon as I got in, I took a deep breathe and there it was, a sharp stinging or burning pain in my chest and everytime I breathe deeply it makes me cough because of the pain, I don't think it's very serious but I would appreciate some help. Thanks.