I woke up thursday morning with a stomach ache. it wasn't too bad, i went to school and everything. throughout the day it would come and go. today, friday, i woke up again with it and it's only gotten worse. at times i've felt nauseated. and the pain is all over my abdominal area. i know it's not cramps and i'm definitely not pregnant. any ideas whats wrong? it's really hurting/