I started what I think was a stomach flu or food poisoning yesterday (fever, chills, bone and muscle aches, headache, extreme fatigue, and lots of vomiting. I did not have a cough or sore throat.). I feel a lot better today, but I've had some brownish red spotting a few times. I noticed the stomach pains were sharpest near my ovaries. Also, the spotting seemed to come after bowel movements. I am not ovulating and my period is not due yet. Could a stomach virus attack your uterus, too?