I'm 14 play softball, kind of a bad diet, and never had any problems with sharp pain, but it just started happening today. When i take a deep breath in it don't hurt but its when i breathe out it hurts. Its not excruciating, but very uncomfortable & i can't laugh without it hurting...what does it mean?..I have a softball game today n i don't know if that will hurt it more. I need help.