Hello there. First, Welcome! Secondly, I sure hope the doctors find a dx for you and can help you. I went around with doctors saying I had RSD and some saying I didn't but finally saw an experienced doctor who recognized it was RSD with a rare presentation. What area do you live in? I have several doctor recommendations so if you'd like, please PM me.

I found this video of sympathetic blocks and thought it might help you.
http://www.rsdfoundation.org/en/en_c...l#NEWNerveBLKS
Pain free hugs xxx