--of people who have shown negative on the serological tests who have had gluten sensitivity, and even biopsy-proven celiac (about 20% of people with villious atrophy show up negative on the serological tests).

Did they also do a transglutaminase IgA assay? That is the test most closely associated with villious damage (at least until some more experimental tests now in the pipeline make it to market).

And, what other tests have you had in your work-ups not specific to gluten? It's certainly possible your symptoms are NOT related to gluten and have to do with something else.