My rheum only ordered anti-dsna farr assay test (not other antibodies). i have ana 1:640 & various clinical sx. does that mean she highly suspects lupus?

Probably yes: Lupus is widely variable in its severity and the most important single factor is that you already have a rheumatologist who you identify as your own. It is far more manageable than it was in the past, though it can still be very difficult; you'll need to become accustomed to feeling sicker than you appear, and others can be cruel or tactless. Good luck.

Agree with Dr. F.: Lupus diagnosis requires multiple factors. Visit this site for info on diagnosis of lupus: https://www.rheumtutor.com/diseases/systemic-lupus-erythematosus/