If I recall correctly, the Sedrate count shows inflammation. When combined with another test, the C-Reactive Protein test, they can see long-term inflammation and short term inflammation.
I also recall that a sedrate count can go high with viral or bacterial infections. That is why it is used more as an indicator of a flare than anything strictly to do with having Lupus or any other autoimmune disease. "Mono" or Epstein-Barr is one that would cause the Sedrate to be high. However, if the doctor thought you should be tested; THEN YOU SHOULD BE TESTED!!!
There is not ONE test for Lupus. Rather, they use a combination of symptoms and test results. There are several tests and symptoms. I think the College of Rheumatology has 11 declared symptoms and if you have 4 or more, then it could be Lupus.
As for seeing if you have Lupus, DO SO!!! The Doctor mentioned it for a reason. Find a Rheumatologist in your area and have them run the battery of tests.
Good Luck and I hope this helps!
LadyBrannon