I don't know CPS, but elavil was all that helped my nerve pain. Lyrica might work for you too, for me, it did more for my muscles it seemed. But you know how it goes, they do different for everyone.
Do look up pain clinics. Mine is awesome, and my doc there did steroid shots (Not that this would help you but...) then also RXd me Flector patches and Arthotec pills for when I can't keep the patch on (swimming).
Something like that may help you.
Thing is, they deal in pain all the time, and if anyone would know, they would. Good luck, Judy. I hate that you're suffering.