I had sciatica twice. First time I moved my wallet to my front pocket from the back one. Second time I had injections from a spinal doctor. One time and within a week it was all gone. Good for 10 years now.
(1) Like you, I performed a walletectomy. That helped.
(2) Chiropractors have dozens of different approaches that do not and cannot help because they focus on the area where the pain occurs, aggravate it by overstressing, and keep you coming back over and over again. D. O.'s do he same thing.
But I visited a very experienced D. C. that used a vibrator up and down my spine, and found that the pain in my back was caused by misalignment of the second and third vertebrae in my neck. His simple gentle manipulating pressure in my neck realigned them, and the pain instantly went away. He told me directly that his goal is to keep me from having to come back. I did, once, until the supporting muculature
(3) My company doctor, trained in Europe and the very best that my General Electric staff could find locally gave chiropractors some credit, but said that mostly not advised for this kind of spine-related hurts that involve stretching the muscle/sinew attachment so far that permanent damage can and often enough does result in permanent incurable damage that even surgery cannot restore original pain-free function.
For me, that was fifty years ago. My ability to engage in heavy back-stressing labor returned. I am now age 88, and still raise a 24-foot ladder by myself. A month ago the corroded cast iron waste line plumbing had to be replaced, and I helped by carrying down the stairs five-foot sawn-out sections of 3-in Schedule 40 waste pipe by myself.
Praise God for the good solutions that enabled me to live a full working life through the following half a century!