About a week ago i started getting really bad stomach pains, almost like sharp stabs.But i just got on with it. The next day they were still there but again i carried on. It was still there on Tuesday except now i had pounding head aches as well, and was collasping onto my bed, clutching my head in pain. After 5-10 minutes, it had mainly subsided and i tried to carry on. But i now have diarrhea to add to it and yesturday my stomach pains increased greatly and now i just feel like i am going to throw up all the time. I have had the chills several times, but also been really warm. Any ideas whats wrong?