While I don't officially have a diagnosis of Lupus, I do have a diagnosis of Undifferentiated Connective Tissue Disorder, and they tell me it is a "Lupus-like Syndrome." The tests are the ANA (anti-nuclear antibody), along with the panel of specific antibodies such as anti-DSDNA, SSA, SSB, etc. Also, a Complete Blood Count with Differential, Erythrocyte Sedimentation Rate (ESR), C-Reactive Protein (CRP), Anti-Phospholipid Antibody (APA) screen, Complements, etc., are helpful for seeing if a person has the blood abnormalities common to Lupus (such as low WBC or Lymphocyte count, high ESR, normal CRP, any APA's, low Complement levels, etc.).
Drug-induced Lupus doesn't typically have any of the specific ANA antibodies, but usually goes away after awhile if the drug that caused it is stopped.
What I've heard others suggest is to print out a list of the 11 criteria for Lupus and take it to your doctor. Discuss each of the criteria and how each one does or does not match your symptoms. This, along with your blood test results, should help clarify things for you I hope. Here's a link to the 11 criteria: http://lupus.org/education/diagnosis.html
Gluten & Sulfite Sensitivity, Multiple Food & Inhalant Allergies, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD (Lupus?), Osteoporosis, Anemia, malabsorption/malnutrition, etc.
Meds: Pulmicort, Claritin, Injectable Vitamin B12, Herbs, Nutritional Supplements, Essential Oils, Homeopathy.