There are no specific tests for lupus other than testing for antibodies. Even if those are positive it does not mean you have lupus. SED and CRP tests both indicate inflammation in your body but neither are tests specific for lupus. These labs help the doctor tell if you have an active diseases but by themselves are non specific as to the cause. Elevated SED can be caused by many things and CRP is often associated with cardiovascular disease. I also have polymyositis and many patients with PM do not register high SED rates but usually have high rates for another test called CPK. But some patients only show higher CRP. These labs are useful but are far from an exclusive diagnostic tool.
MCTD (SLE Lupus, polymyositis, scleroderma). Diagnosed 2005. Kidney, liver, GI tract, dysphagia, raynauds, barretts esophagus, quadriplegic in 2005. Recovered and now active in downhill skiing, golf, hiking. Meds: amlodipine, benezapril, omeprazole, potassium, folic acid, vitamins, maxide.
Remain Optimistic and you can overcome.