Some Drs rely only on tests to make a diagnosis, although the Lupus Org (see diagnosis lupus link below) and the CDC rely on a combination of symptoms "4 of 11" to diagnosis Lupus. Other Drs look more at the whole picture.
However, usually we end up having our symptoms treated long before receiving a diagnosis -- part of the diagnosing process is to see which meds, if any, we respond to.
If your Dr is taking steps to relieve your symptoms, that's great. If not, you may want a second opinion. I would check the Lupus Org to find the nearest chapter, then attend a meeting and ask people what Drs they suggest and which Drs use which methods of diagnosis and treatment. Not all rheumies are well-versed and liberal in their approach.
Hope that helps -
Lynnwood, Lupus & Sjogren's ModeratorDIAGNOSING-LUPUS & LUPUS-RESOURCES
"Life is far too important to be taken seriously" - Oscar Wilde