GF diet helps reduce Rheumatoid Arthritis pain, gotta mean something

Hi, I switched to a GF diet about a year ago when I read that by eliminating sensitivities it could reduce inflamation in my joints. At the time I was ready to stand on my head and sing the national anthem if it would help cut the pain. After I was GF for a month I realized I no longer had a stomach ache that I never realized I had till it was gone. Other GI symptoms like gas, bloating, fatty stools also disapeared. The pain and fatigue decreased so long as I didn't slip up in the diet, but if I accadentily ate something the GI irritation would kick in and my joints would become warm and inflammed andpain would be really bad. GI would last about 5 days, but the increase in pain could take 1-2 weeks to go back down. In the begining I wasn't getting many days between results of accadental gluten and eating it again. Not that I was making a choice, I just wasn't good at it yet.
I have approched both my rheumatologist and my GP about getting tested for gluten intolerance, but they look at my weight (268@5'9") and the fact that I am already on the diet and say it is not worth it. If I choose to be on the diet that's fine, but I would have to go off to do the test, and we already know it works.
I am also bipolar, in fact with the complication of daily pain and the way the drugs play together, I am legally disabled due to the bipolar. Keeping to a true GF diet through my highs and lows is not easy. Modified food starch is in everything! If I am manic I am impulsive if I am depressed I don't care.
I go to a dietition later this month because my GP wants me to loose weight since I now have irriversable joint damage that will give me chronic pain. He feels we can try to save use of my weightbearing joints in later years if I weigh less. He has a point, and I am only 32 so I need to plan ahead. I don't eat a lot, but the weight is slowly increasing, probably since I am not nearly
as active as I was 3 years ago before I got sick. Hopefully she will have ideas on ways to easily diet GF that won't kill my hands chopping and mixing.
I am not sure what I am asking other than does this sound right to you? Do you have advice for me? Do you think I should press for tests and a Dx even though I have no intention of going off the diet if the results come back normal?
I don't know any others who live GF, even on the RA and bipolar forums.
Thanks for reading.
Christina