The only thing I actively did that coincided with getting better was that I started lifting weights. I had a shoulder injury at the time too, and just... tried to take a holistic and engaged approach to building my health.
I don’t like to encourage people with back problems to do what I did because it just as easily could have gone south. All I knew was that when I did deadlifts or squats I would get this fleeting relief from the pain and I’d gain mobility back for hours.
I also reduced my running. I ran a lot at the time. I had sciatic pain before the running too, but it seems running never helped it. Perhaps only made it worse.
I also tried to do more yoga. Yoga was hard because it was never rewarding, always excruciating. However I had a sense in the moment that I wasn’t harming myself and that the pain was the gain variety. It was just intuition.
I really believe movement is healing, or trying to strengthen yourself. Something I wish I’d done at the time was stop drinking. I don’t think alcohol helps any. It’s appealing though because anything to take the edge off is hard to resist... I actually drank quite a bit through that pain. Maybe not by some standards, but by mine, far too much. When you have an inflammation problem though I think alcohol is the last thing you need to add to your diet.
Anyway, if you can handle it, maybe some light compound weight lifting is worth investigating. Or yoga. Look into sitting bends and twists - they’re very easy to learn and ease into, and very unlikely to harm you. Throw on a podcast and commit to a few weeks of trying maybe.
It’s such a hard problem to navigate and find solutions for. In any case, I wish you luck. I really wish I had good advice for you.