To answer another of your questions, I can't really tell you what to expect, since no CRPS patients experience the same type of symptoms, progression & severity of symptoms, spread or lack of spread, and length of time before symptoms go away (if they go away).

Good luck with your neurologist. If you get the sense that he/she is not taking you seriously, tell them that you would like to see another neurologist.

If you haven't already had one, you will probably have a nerve conduction study sometime soon to confirm the location of the injury (even though it's obvious since it was caused by a needle). I'm assuming your diagnosis of median nerve injury is based on location of symptoms(?).

Gotta go,
Annie Poo