This morning at about 8:00, I developed severe stomach cramps, vomited many times til about 2:00, and experienced diarrhea. From about noon til 5:00 pm, I also experienced chills. By about 6:00 pm, all the symptoms are over except for fatigue. I get this malady about once a year and expect to b back to normal within a few hours. Could this be rotavirus, food poisoning, or a food allergy?