I suffer with a bad wrist pain every so often mainly in my left even though i am right handed. I play drums, i do weight lifting, trials riding and xc riding.
I had the similar side effects like you had any slight movement it just use to hurt so much in pain and it was fine in a normal position.
I found wearing a wrist support and covering my wrist in a cream called voletral seemed to of helped it and to go steady by not riding or drumming or even lifting for a week or so.