I'll second the recommendation for Dr Sacks - he is my FS (I don't have an autoimmune condition though) and has just helped a friend of mine who does have a rather serious auto immune condition fall prg after many attempts at IVF with other drs (her condition is such that she could not conceive without IVF).

He's a miracle worker! Just search his name here on BB and you will find quite a few threads/posts about him.