Hi and welcome to the forum, sorry to hear that you may have lupus though. Sounds like you've been having a lot of issues. Hate to hear that you're having to wait so long to be seen. I have a friend that lives in Alberta and she's mentioned that it can take along time to get appointments.
You asked about what conditions could cause a positive ANA and leg pain issues. A person can have a positive ANA w/o any others symptoms and have just a virus. The positive ANA can be just that, but when you also have specific symptoms with it then Dr's can begin to look and piece together whats wrong. Just an FYI if you have Fibro you will not have a positive ANA. Fibro isn't an auto immune disease nor is it an inflammatory disease.
I hope that you get in really so and your Doctor is able to figure out whats going on with you and can begin to treat you so that you can begin to feel better real soon.
Please stay in touch and let us know what your Doctor has to say.
DX- RA, Lupus, Fibro, LGL Leukemia, Pulmonary Hypertension, Bells Palsy, Gastroparsis, Blood Clots, Cateracts, Glaucoma, Chronic Pericarditis & Pleurisy, Severe Anemia. Way to many medications to list.