Lyrica seemed to help, I guess you tried that, it's basically the same as gabapentin although maybe a bit better. Amitripyline for sleep, I still use this. Physio seemed to help a bit as well.
I seemed to get some genuine benefit, lower pain, some healing; using ashwagandha, St. John's wort, and American skullcap. Which are all for nerve pain and relaxation/ sleep. Ashwagandha I just got capsules from amazon, the other two I used fresh tinctures from an herbalist store (herb pharm) because it is supposed to be better for these two. I raise the dose until I can feel some kind of clear relaxation, try for 4 weeks, change etc. Herbs can work surprisingly well, but not well enough for me, unfortunately.