Then I suspect that there is another reason for your pain; probably involving the muscles. I would think that someone versed in kinesiology should be able to provide some insight. I'm sort of in the same boat as you are and might end up doing the ablation. Things that are supposed to diminish nerve pain like GabaPentin or Pregabalin aren't helpful. PT [at least that which was prescribed] doesn't help. Recently I was prescribed a muscle relaxant [Metaxalone] which doesn't really help either. I take just one 800mg dose at bedtime. It does help me get back to sleep faster if I need to make a pee trip during the night. FWIW I determined that Metaxalone was likely the best muscle relaxant to take with PreGabalin as far interaction is concerned.

A long time ago at work I was reaching into a barrel in order to get something off of the bottom and pulled something in my lower back. I couldn't stand up straight for 2-3 days. My situation is sort of like that now. I start to walk andcan feel pain in my right lower back kind of above the pelvic bone. As I walk the pain tends to spread away as well as I feel like I'm being bent over. Also walking uphill makes it even worse.