I have had bloody diarrhea, nausea, and abdominal pain. My GI doc says I have an unknown of colitis, it has been slowly getting worse, then he said I was lactose intolerant, and then he said I was gluten intolerant. So fair nothing has worked. I have had a colonoscopy, EGD, 2 CT's, a small bowel series, and sonograms done along with blood work and he still has found nothing. Can anyone tell me what is wrong with me.