I would start vitamin D therapy ASAP! I broke 2 vertebrae 30 years ago (went off a roof and landed with a brick under my back) Back specialists told me I'd never walk again, but my GP (British born and trained) had the 2 broken VBs tied and started me on mega D vitamins and calcium.
I went from that to pumping iron again in less than a year and regained my ability to walk. I'm recovering from a broken rib last year (I'll be 50 soon) and even had a car fall on my head (Duvall quake of '95) that almost squashed it, but I survived! (a little Dain Bramaged)
What has really kicked my butt is my thyroid being messed up (from one of the whiplashes I've had from being hit from behind so many times at red lights! Freakin Seattle drivers!)