Strange stomach and rib pains....?

I might go to the doctor about this but I wanted some good opinons first. For the past two or three years my ribs have been sticking out, it seems like it happens more and more. I have not had a dramatic weight lost, actually I've stayed pretty much between 112-116. That weight isn't super skinny for my age and height, I'm about 5'3''. One side, my left, sticks out really big! It hurts to touch my ribs! Lately I have been getting weird pains. Its not so much in my stomach it seems like its above my stomach. No one say anything about being pregnant because I'M NOT! Trust me! Is this unusual? I do have meat on my bones...in some places a little to much. One more thing, I do ballet but I don't see how that could do anything. It started hurting before I started dancing but its just gotten worse! PLEASE HELP!