GI.PA - AIH

GI.PA, I have autoimmune hepatitis, diagnosed 17months ago..Right now I'm down to just 75mg of Imuran daily..My question is, in your practice do you find that people with one autoimmune problem are more likely to have others..I also have Raynold's Syndrome..Been diagnosed with Fibro too..I saw a Rheumy and really didn't get anywhere..He THINKS, I could also have Lupus &/or Scleroderma..Says he can't give me a correct diagnosis as far as the Lupus goes..Says maybe I'm not advanced enough to be sure..Aren't there any tests out there that could give me a more accurate diagnosis..I also have osteoarthritis..But over the last few months, my joint pain, stiffness has gotten a lot worse..Have muscle weakness, fatigue, get itchy rashes on skin(been getting those for years)..I have no more appts. scheduled with rhuemy..Didn't know if I should first contact family dr. or right to the rhuemy..Any suggestions or help you could give me would be greatly appreciated..I am a 48yr old female..
Thank You,
Donna