Ana 1:640x10yrs, other labs neg. flares of rashes, fatigue, arthralgia, myalgia, dizziness.crp & sed normal during flares!tx: plaquenil (hydroxychloroquine) & low doses pred prn. dx?

Atypical lupus?: No one knows what lupus really is, and your situation is not uncommon. Many folks like you never get a diagnosis. The empirical treatment you are receiving now seems appropriate to this non-rheumatologist. Good luck.

Fibromyalgia : This all could be related to your fibromyalgia. The positive ANA could due to something else. Most people with a positive ANA do not have lupus or any other inflammatory joint disease.