So, I gave it time and the acupuncture gave me 0 relief. Went back to the doc and he sort of threw up his hands in frustration and sent me to a spine guy.
Spine guy took X-rays and - good lord! One of my back bones looks like a piece of cauliflower. But aside from the arthritis he saw "Spondylolisthesis, grade 1 [M43.10]" whatever that is and he says that it the source of the pain. He is going to give me an injection into my spine. He's very confident he can get me pain-free, but X-rays from 2019 show the problem has deteriorated a lot in 4 years. He says surgery may be in my future.