overactive immune system

I guess all though I have done a lot of reading I am not quite understanding CIDP. My doc has talked about putting me on immune suppressant drugs to suppress my immune system, if my immune system is not over active why these drugs. I live in Spokane Washington and I am wondering if there is a doc in the area that specializes in GBS or Cidp may my doc is not up to date on treatment. The first few times they kept thinking I had MS then told me I had emotional problems and needed to see a shrink. I now think I started having trouble in 1998 but got so discouraged cause I was being told I was nuts I just quite complaining till I could not walk then they listened.