I, too, suffer from both fibro and CFS and can fully understand the pain they can bring.
My guess is that your
PM doc switched you to the fentanyl
patch because he felt that you needed a long acting pain med as opposed to the hydrocodone (short acting) that you were taking.
I understand about you not wanting to get addicted to the pills, however, you must remember there is a BIG difference between dependence and addiction.