Hello,
I am much older than you, but I was just recently diagnosed with pretty bad DDD and facet joint arthritis in my lumbar spine. I also have RA. I know about the lower back pain, though. I just thought I would post what works for me. I have to take Soma ( a muscle relaxant ) when the pain gets bad or I cannot walk. I feel for you trying to do your job with this kind of pain. Are you taking any NSAIDs or pain pills at all? I work in an office, so that helps a lot, but I still struggle to work every day with RA, OA, DDD and this new facet joint arthritis, which I believe is from RA. RA can attack the lower back, it just isn't all that common. Hope you are able to find something to help with the pain, and that your employer works for you. Please let us know how you are doing.
Best Wishes,
Vannie