I have very similar blood work as you do. I just got diagnosed with Mixed Connective Tissue Disease (more of a Undifferentiated one) last month. I also have Firbomyalgia. It took me years and years to get this diagnoses but the fact that you are seeing a Rheumatologist is great. I don't know why the Dr. is holding off because of the anti DNA DS?? Mine was negative also. Blood work is tricky. I am on Plaquenil and feel better with less fatigue. ANA can differ too and that doesn't mean someone doesn't have the disease. Basing your diagnose on blood work is not good. Nothing is more frustrating than going to the doctor not feeling well in pain just for them to say one test is not positive. These doctors need also to look at the patients symptoms along with the blood work.
Here is a perfect example as to why.......Long story short.........I went to my dr's for years complaining of pain, nausea, vomiting etc...and was dismissed as a nut. Found out that I had a parathyroid tumor growing for 10 years!!!!!!! I had to diagnose myself (how sad is that?) It caused severe osteoporosis. I had it removed last year. My calcium level was high but not too high so they thought it was no big deal. The point is that I had all the symptoms with slightly elevated blood work. Not everything can be based on blood work and by looking at yours it sure seems clear to me something is going on. Please stay on top of this and if you doctor won't treat you or at least try to treat you I would be getting a new doctor.