Get a rheumatologist

You guys may be ahead of me on this one, but I had no idea until recently what a rheumatologist was.  They are doctors who specialize in autoimmune diseases - which is what Celiac disease is.  If you're in the DFW area, I recommend my doctor - Dr. Stern at Rheumatology Associates.  Many people with Celiac disease have some other autoimmune diseases.  

If you go to a rheumatologist, they can evaluate you for those other issues.  Also, they will give you a full panel of gluten antibody tests and you can see if your body is reacting to getting gluten.  This can help you figure out if your diet is really as gluten-free as you think.  Even if you already see a gastroenterologist, adding one more doc is worth it!