Thanks for all the replies and information, everyone. Lately I've been trying to distinguish the differences between CFIDS and Lupus, and I'm not really having much luck because they overlap so much. You can see increased T cells and low NK cell function in BOTH conditions. I do have a positive ANA, and swollen joints with my flares (just my knees), but you can also see those problems with CFIDS. At this time, my doctors are waiting to see if I ever get any organ involvement, so they can't rule it out at this time. They said it can take up to 7 years for a proper diagnosis. Until that happens, I am sticking with CFIDS. My family doctor didn't agree with the Rheumatologist's diagnosis, she felt strongly that I had a mixed connective tissue disease, but that's not her call. Sometimes I wonder if CFIDS and FM are just "subclinical Lupus." They all obviously have an inflammatory component.
At any rate, the butterfly rash hasn't returned. Not with my latest flare, and not with sun exposure, so I'm thinking it was not Lupus-related. I'm really thankful that I DON'T have Lupus (yet?) because I would really hate to take steroids. They make you gain weight, they tear up your stomach, and they cause bone loss. I'd probably get lots of viral reactivations from the immunosuppression, and that would be awful. I'm hoping I'll always be able to manage my symptoms with anti-inflammatories and rest.