It could be so many things when it comes to a stomack but it might even be I.BS. It's very common in woman.

This sounds like a odd thing to say, but try labor breathing when you feel it and if that seem to ease the pain then it could be IBS or stress related. I suffer from it and that was one of the first things the DR. had me do. It really helps. You might feel silly and look silly but give it a try, just to see if it helps. Also try not to worry about it to much, the worring just seems to make things worse.

If that doesn't work or you don't feel better soon, go to the Dr. there is a stomack thing going around. My husband just got over it, he wasn't eating also, but he had other problems with it, that we wont go into. If you know what I mean.

Hope you feel better soon.