Hmmm... Lupus is very hard to diagnose sometimes. You are not over reacting, but keep in mind that antibodies tests are not always reliable sign of presence or absence of disease. The best thing you can do is to take advice from your doctor and to inform about lupus. I hope that helped
Don't worry, it's never Lupus. -Dr. Gregory House.
But seriously, a simple ANA titer should give you an idea of how active your immune system is. It won't diagnose Lupus, but it will tell you when your immune system has kicked into overdrive, whatever the reason. It's a lot less of a hassle than getting tested for Lupus yearly, so consider doing that instead. Should the ANA ever go through the roof, then you can test for Lupus.