Have you had some good blood work done? Your pituitary gland checked? A local doctor is having major success treating Fibromyalgia and other pain issues by checking (through a blood test and getting your history) the pituitary gland, then, if there is a problem, treating it with Human Growth Hormone and Estrogen/Progesterone. It might be a lead for you.

Wishing you well and hope you are able to find some relief.