I am so sorry to hear you're going through this. My hands have not gotten to that level, but I have battled carpal tunnel and tendonitis for years and occasionally have arthritic pain. I see someone has already recommended braces and hot wax. I would definitely wear the braces every single night on both wrists, and would buy the longer braces, not the ones that end right above the hand.
I noticed around Christmas that my hands were worse and I think this may have been because of a higher sugar intake. I use a supplement called SAM-e which I think helps me somewhat; I can really tell a difference if I stop taking it.
I hope you will recover completely!