Welcome @shiela58, I know it must be frustrating to be in such pain and not able to find a treatment that helps. In your first post I noticed you mentioned being diagnosed with SNF polyneuropathy. There are a couple of other discussions that you might find helpful:

-- SFSN: Symptom Relief: https://connect.mayoclinic.org/discussion/sfsn-symptom-relief/
-- Burning sensations, acid-like pinpoint pains, all over: https://connect.mayoclinic.org/discussion/burning-sensations-acid-like-pinpoint-pains-all-over/

There is always hope for nerve regeneration but for neuropathy I don't think we are there yet. That's just my own non medical opinion. There is another discussion on the topic here - Does Stem Cell Therapy work for Neuropathy?: https://connect.mayoclinic.org/discussion/stem-cell-therapy-for-neuropahy/

You mentioned you are seeking a second opinion. Have you thought about seeking help at a teaching hospital or a major health facility like Mayo Clinic?