I am sorry you are having such a hard time. I can relate a lot though I have dx of PN and RSD it took a long time and also still have a lot of unknown of why I have certain symptoms and also the why behind the RSD and PN is unknown. I think I recall saying to you that my 1st NC did not show PN but then 2nd did. Though they don't feel that is what causes my pain. The pain is from the RSD
I am sorry can you remind me have you had an injury,accident,anything in the past that at the time you may have not thought of but looking back could be a connection such as illness etc?
Hang in there