I'm not sure what type of doctors you are seeing, but a pain management doctor will probably be your best bet.

There are also different drugs that are used to treat the different types of pain. I'm on Cymbalta for the "nerve" burning pain. There are others in that group that are used. I do well on the Cymbalta and it helps with the depression that comes with Chronic pain. I'm also on 2 different muscle relaxers for spasms and cramping. Along with a "pain killer" and I also have a cream.

What area are you in? Someone may know a good doctor near you.