Hey Dicey- Ouch... been there. I suppose everyone's experience may differ but for me playing (at all) wasn't even an option. I couldn't turn my left hand to a "palm up" position at all. I dusted off the Casio and tinkered with keyboard for a while. While I hope your case is different I was completely OFF the guitar for several MONTHS. Slowed me down in a lot of other areas too. ( I didn't do any sort of physical therapy or anything - I just rode it out.)

I think they call this an "RMI" - a Repetitive Movement Injury. Very, very slow healing process. Good luck brother, mine was 15 years ago - hopefully they have better treatments for it now?

Take Care-