Some docs try anti-epileptic drugs for pain: gabapentin, Lyrica, etc. Have you tried those?
I also use a topical, called Penetrex, avail. at Walmart, penetrex.com or Amazon. It is arnica and other ingredients. Has really helped nerve pain in my feet.
Are you able to take NSAIDS, like Aleve (naproxen sodium) or ibuprofen? These can help inflammatory pain.
I am so very sorry you are in pain and feel your doc is not really hearing you!
WC