I'm so glad that you are receiving some positive results from your treatments! My red light therapy was "Class 4" laser, and it was my breakthrough therapy, where I first regained feeling in the soles of my feet. I have moved on to other therapies (part of the reason was the cost: Class 4 was not covered by Medicare, whereas the weaker laser was covered, but provided no relief).
The "other therapies" include BEMER and a vibration platform. Since mine is long-fiber, I have dealt with pain for about 25 years, and for the last 6, I have been taking Pregabalin and Tramadol, and they keep the pain at bay if taken every 8 hours. It seems that every person with PN has different symptoms, needs, and therapies, and the treatments and outcomes are very individual. I wish you all good things as you continue to find solutions where there is no definitive cure.