I too had a frustrating time diagnonsis gluten sensitivity. My primary at the time was cluless. I found celiac.com, then enterolab.com. I sent in a stool test and it came back "significant gluten sensitivity". Then i sent in for the gene test and it came back that I did not have the main gene for celiac disease but had 2 copies of the gluten sensitivity gene. A gluten-free diet helped tremendoulsy. I urged my parents to be tested but their doctors refused. One year later after my mom had 1/2 her stomach removed due to stomach cancer the oncologist finally agreed to test her and she came back positive for celiac disease!
I don't know what it will take to wake these doctors up...
Check out Enterolab, Dr. Fine was right..