I am sorry to hear this. And though my condition is not the same... here is what I do.

I suffer from a bad case of RSI in my knuckles due to the constant beating the get from work.

I find in winter my hands tend to play up quite a fair bit. They get cold very quickly and tend to become stiff aswell.
I just chuck on my snow gloves for about half an hour, otherwise the next day my joints are that stiff.
I was told just to take anti-infammortory to help the circulation on really bad days and I find it does help.
But days like today, when I have been on the ovens my hands become very stiff. Just typing can be painful.

I am sorry again about your diagnosis, and I hope someone can give you the answers you need. (((hugs)))