Sunburn?

Seven months ago, suddenly and violently, my skin began to hurt as though it were badly sunburned. I don’t go out in the sun (melanoma 22 yrs ago).
Dermatologist informed me it was not a skin issue. Primary care Dr. Sent me to a Neuro Doc.
Five months of pain, then Dr. Neuro tells me I have small fiber neuropathy, likely permanent, though some cases have lasted only a couple of years. He gave me pregabalin, which has relieved 75-90% of the pain, but leaves me feeling drowsy and I fatigue easily.
Another doctor (friend of mine) heard that Naltrexone and Lion’s Mane have been helpful to others with similar pain.
Last week, desiring to be clear headed again, skipped a pregabalin dose and the pain came roaring back. So bad.
I would love your recommendations for treatment, tolerance, and how to find acceptance that this is my new normal.