Yesterday, about 5:00 p.m., I began to cramp horribly, lower abdomen, and barely made it to the restroom. Never threw up. Intense pain, sweating and diarrhea. No fever but made several trips to bathroom. Took Advil p.m. and slept well. Woke this morning and had to go to restroom again. Noticed quite a bit of bright red blood in toilet and wipes. I m feeling fine now. Concerned mostly about bleeding. I ve been eating low fat since January. I had pizza at work yesterday. Food poisoning?