Welcome to the site. I think that it does sound like you may have Lupus. I think that you need to see a different Rheumatologist if that is possible. Did you mean that your ANA is 1:320 as that is a positive ANA result. The stiffness and soreness in your joints sounds as though it could be Lupus also. Have they done a kidney test on you for the swelling in your feet? It also sounds like you are very sun sensitive and that would go along with Lupus too. I don't know that much about the addiction, but I don't think that that would cause these symptoms. I seriously think you need to see a different Rheumatologist. I hope that you keep posting. There are others that will come in here to greet you as well and they may have information for you.
Lupus for many years. Like most of my life. Sjogrens that started at 35 and Scoliosis, Spinal Stenosis, Degenerative Disc Disease, Osteo-Arthritis of the spine, Ankylosing Spondilitis, Periferal Neuropathy, mild CP and now just recently diagnosed with PA. I had a disc replaced in December of 2007.
Plaquenil, Sulindac, Imuran, Celiac diet, Tramadol and B12 shot once a month.