How Can Vertigo, Tinnitus, Headaches And Hand Numbness Be Treated?

I have been diagnosed with Lupus CNS. I am currently taking cellcept and prednisone. I was hospitalized last month and was given 1000mg of prednisone by IV for 3 days. This helped for awhile, but I am starting to have the same symptoms as before I went into the hospital. I have vertigo, ringing in my ears, headache, hands and feel go numb even when I m using them. I tend to fall if I m not careful. I have also blacked out a few times. I have consulted with my rheumatologist who suggests that I either wait and see if the cellcept is going to start working or start trying Cyclophosphamide (Cytoxan). I am afraid to take the Cytoxan as both of my parents died from cancer.