Oh man... I get your frustration. Just RUN from doctors. Get alternative therapies and then go back to someone different for the GYN issues after you've had a chance to self-heal. Start with a Chiropractor, find a Nuropath doctor, anyone with 1/2 a brain steeped in logic will do.
What I did was run from the medical community for 2 solid years. I returned to get thyroid testing, symptoms like you and the endo mailed a hand written note (barely readable) that states my thyroid levels are all within normal limits. The endo will not see me again (I had to have a referal from the testing doctor to even get in to see this endo). He has written down that I should be tested next year by my GYN. It was the GYNs test that showed abnormal thyroid levels, the endos test did not I'm probably low normal which is abnormal for me.
I called the office to ask for a copy and they said we sent them to you. I as calmly as I could said I received what they sent and it was not the actually lab reports but rather a hand written summary that levels were normal and I wanted actual numbers. OH, shocked and amazed tone, we'll get those out to you tomorrow... I'll hold my breath! NOT.
For myself, I'm done with docs. I got what I needed which was the blood tests. I will do Julia Ross's Diet Cure with Amino Acid therapies, self prescribed. I want those numbers first to see if I need thyroid grandulars added to the amino acids.
On the Gluten issue. If you change doctors and say you are Celiac, they should not ask for a biopsy report. Go without records, don't allow them to access your old records that probably say "patient states they are Celiac, no biopsy". I got the pedi to write a letter for a nutritionist that states Celiac Disease, I can loose everything else and I've got my proof. (DS2 is not biopsied). I just need to change doctors again sometime, actually just take him in to see the Family Doctor and state he is Celiac. I have a Pedi and a FP with records on my children (FD is local for quick stuff, Pedi is an hour away).

Note the nutritionist visit was a total waste of time - "don't give him anything with more than 5 ingredients listed, it is just too hard" this coming from a Celiac!!! I know more about nutrition than 2 "professionals".

Good for you to say no to drugs. That is the answer for everything these days. I do hope you find out what is causing your pain. I would think the GF diet would have cleared up the neuropathy, but that is just what I've read here.