I cannot tell the difference between the SLE and Sjogrens symptoms either- they overlap. Do you keep a journal about
symptoms you are having? Also include activities and food, maybe if you had a glass of wine...I know you know, but some things trigger a flare and it could be something you discover in a journal. Plus, it is good to have it handy when you go in to see the doc.
I'm so sorry- it is hard.