I have been dealing with peripheral neuropathy for almost 20 years but it has kicked up significantly in the last 3. I also have autonomic neuropathy, both due to Sjogren's syndrome.  I take gabapentin and duloxetine but pain isn't the worst problem, numbness is in my case. I have been seeing rheumatologists for this but I get an opinion from a neurologist in a few days. Highly unlikely that anything can be done about either form of neuropathy. Hopefully you'll have better luck with the chemo induced version.