Hmmm I would think that arthritus would have shown up in the scans. I'm not sure that sciatica would have shown up.

I hope the medication helps, I believe it will no matter what is actually causing the pain. If it's for inflamation though, it can take weeks to really build up enough to help.

I keep thinking about you and this...I like puzzles and challenges You say it doesn't bother you when you sleep? Do you sleep on your back or the same side each night? IDK but sending good wishes.