Hi and welcome to the lupus forum. Sorry to hear that you're having issues with your tendons. I've been struggling with severe tendonitis in my Achilles tendon. My doctors feel mine is coming from being on the long term steroid usage that I've been on.
To answer your questions about lupus. As Joy said we're not Doctors but some of us have been around the block for awhile. I've had lupus for 26 years now. I'm very sick with mine and do not respond to treatment at all. I'm in a constant flare 24/7 all year long.
If you've gone over the 11 symptoms and feel that they may be related to your other conditions it may be. Lupus is known as the disease of 1,000 faces and it's very hard to DX. I'd write down the symptoms you are having and take photos of any rashes that you may have. When you see the Rheumy on the 15th takes these items with you for him to look at.
The ANA being positive at 1:160 is positive but not to bad. Normal is 1:40, the 1:80 is a positive but barely the next would be 1:160 and so on. The higher the ANA the more weight the doctors take it, but lupus isn't DX'd on labs alone, you must have 4 of the 11 symptoms to get a DX. Having the DX isn't the important factor, but more so getting treatment for your symptoms to control the disease process.
I'd wait and see what the Rheumy has to say and then go from there. If we can answer any ?'s please ask away. Good luck with your appointment and let us know how it goes.
DX- RA, Lupus, Fibro, LGL Leukemia, Obstructive & Central Sleep Apnea, Pulmonary Hypertension, Bells Palsy, Gastroparsis, Blood Clots, Glaucoma, Chronic Pericarditis & Pleurisy, Severe Anemia. Way to many medications to list.