You really should go to a pain management doctor who can try all SORTS of options for you. There are many options for pain relief in pain management.

A pain management doctor is usually an anesthesiologist, so he knows about pain receptors, etc. He's been highly trained in that kind of thing. So that's your best option at this time, if you haven't been to one. They also use medications if other things don't work.
I hope you find some relief SOON. Please let us know what happens, will you? I wish you the very best of luck, as well as pain relief! God bless & take care. Hugs, Lee