I'm still trying to learn a lot of this RSD stuff.

Do you mean you can't actually use your arm - as in muscle use/movement?
or you can't use it much because of the pain and swelling?

All I can suggest is try to not worry/stress about things you can't control - from what i have read stress is a big factor with many pain/symptoms syndromes.
I know it's hard to do that though.
Sometimes I do a intense worry about things and then I decide I can't control it -then just let it go and cross that bridge when it comes.

Deep breathing, relaxation, visualization- trying to reduce the tension- I know you have probably heard that all before - but we can all use the reminders.

Typing it just reminded me to do it also, I've been slacking on my stretches and home therapy too. {RSI/TOS}