What blood tests can be used to diagnose Lupus?

I am almost positive that I have lupus, as I have almost every one of the symptoms. My doctor also thinks that i may have lupus, but every time i get a blood test, everything is negative. What tests can be used to diagnose lupus? Because i want to find out for sure if this is what I have
I was already diagnosed with fibromylagia but my symptoms go beyond just that. I have also been tested numerous times for Lyme disease and other rheumatic diseases, all coming out negative.

Answer
Raised ESR. Reduced white cells, reduced lymphocytes, and/or reduced platelets. Serum antinuclear antibodies (ANA) is positive in almost all cases. Double-stranded DNA (dsDNA) is specific to lupus but is only present in 50% cases. Anti-Ro and anti-La can also be detected. 25% patients have rheumatoid factor. Reduced serum complement levels during active disease.