oww

Does anyone know what it means when you get stomach cramps (like spurts of pain) for like 3 days straight? I don't think it's sickness, I don't feel bad anywhere else, but I don't know what to do. I've tried tums, pepto, and gas pills and none work so I'm starting to think maybe it's an allergy to something. Girls just picture period cramps but higher, it's not very comfortable at all! The only thing that seems to work is curling up into a little ball....