I understand your frustration. My GP diagnosed me with fibro and prescribed pain meds. Every time I said I hurt, "it's the fibro" and more pain meds. I went to a chiropractor on my friend's suggestion. One ex-ray revealed scoliosis. Now I see the chiropractor and have minimal pain.

I'd go to another doctor or insist that you don't feel it's fibro. I don't know if it'd do any good, but it can't hurt to try.