I have had diarrhea for 1 1/2 years; been to the GI doctor several times; have been scoped and a colonoscopy. Still I have diarrhea, nausea, vomiiting, stools that float as well as what appears to be oil in the toilet with bowel movements, tender canker sores on tonge, abdominal pain and bloating, gas (and gas pain); I battle anemia and have a low white blood count; I have tons of tiny bruises and bruise very easily. My colonoscopy, upper GI, Endoscopy of the upper GI tract all were negative. My GI says I have IBS and an inflammed bowel. I still suffer every day with symptoms. They tell me to try to deal with it. It is possible I have Celiac Disease? What kind of a test can I have to see if I have that?