I'm having a really hectic week, so I can't go into diet right now (will soon).
You have a primary doctor, right? Have they done a urinalysis lately? If you have symptoms, having a UA can be revealing if you have lupus or other connective tissue diseases.
Urinalysis Test for Lupus : Physical, Chemical and Microscopic Analysis
If you have rashes on your skin after being exposed to the sun, a dermatologist can do a biopsy.
Is no one really thinking about symptoms here, or what to test for? Doesn't seem like it.
Annie