@scain ....Hopefully my experience dealing in the past with same issues will help you..
-a neurologist will do zillion of tests, the most important is a large nerve electrical conduction test-if positive -the neuro will tell you there's no treatment for peripheral neuropathy and put you on Gababentin...a neuro is not doing test for small fiber neuropathy...
-a podiatrist will do a skin biopsy for small fiber neuropathy ( SFN)-if positive-the podiatrist will tell you there's no treatment and put you on Gababentin...or propose to put you on TEENS unit...
After going thru all these for three years and due to my excruciating symptoms- I was desperate and almost suicidal...but God providence guided me to a clinical pain institute doing Sanexas treatment ( google it) and B12 shot straight into my feet..it turned out my peripheral nerves were starving for B12 which was prevented by metformin to be absorbed....of course my primary not even wanted to hear about it although my B12 in system was double level.
After just three month and twice /week treatment with Sanexas (stopped metformin and replace it with jardiance ) and some other life style changing -I'm completely healed...
Hope this help!