Diabetes and Lupus CAN go hand in hand, since both are autoimmune (since you have Type 1). I have both Type 1 Diabetes, and Lupus. When someone has autoimmune disease, they have a tendancy to develop others. Look at all of the people out there that not only have Lupus, but have Sjogrens, Hashimotos Thyroiditis, etc. There are tons of similarities of the autoimmune functions at the cellular level. As for the calf pain, I agree with Shari to get that checked out immediately.
The drugs prescribed for Lupus can be: Prednisone, Plaquenil, Methotrexate, Imuran etc. There are MANY different ones and your doctor will pick them according to how much you have going on in your body. Many people are put on prednisone with Plaquenil, but if that doesnt work then they will be put on others. It all depends on the person. I sincerly hope that your Rheumy will diagnose you properly.. your ANA is quite high thats for sure!!! Anyway, please take care.. and ask any questions that you may have!