mzbhavn - I have autoimmune hepatitis, diagnosed about three months ago. At that time, they said it was in the early stages, but I've had problems with unexplained rashes for years. I have itchy skin, aching, swollen joints and sometimes almost crippling fatigue. Also, I have been living with autoimmune thyroiditis since my early twenties.
My doctor has put me on Plaquenil instead of prednisone. It has fewer side effects, but I have to have my eyes checked every six months or I can't get the prescription refilled. This med sometimes causes lesions on the eyes.
You can get information from the autoimmune disease association and generally find a lot of information on the internet. The hardest thing I've found to deal with is the limited number of anti-inflammatories I can take. Both naproxene and ibuprofen can affect the liver, as can all the cox-2 inhibitors.
Since I've been diagnosed, I've found that my mother and at least one sister also have autoimmune diseases. You can have more than one and you will usually find someone else in your family that has one or more, but not necessarily the same one as you.
Hang in there!