--got all the way done and into the duodenum and upper part of the small intestine, villous sampling could have been done to check for the changes of celiac, though sometimes the intestinal damage is patchy and may be beyond the duodenum (there are false negatives that occur this way).

Have you had any of the blood celiac panels that look for anti-tranglutaminase igA, anti-glidain IgA and IgG, and anti-endomeysial antibodies?