Hi Kelly,
I'm one of those who ended up having some pretty serious issues, I had a transplant in March of last year--06. Doing great now, knock on wood. I have had kidney issues for about 14 years as well. I still don't have a definitive diagnosis, was told originally I had Lupus Nephritis, but then they took that away, saying I didn't have enough criteria to warrant a diagnosis of Lupus. I've got a "lupus-like autoimmune disease".
It sounds to me like your doctor is on top of things, you've been through the cytoxan, are on steroids and immunosuppressants now. There are other immunosuppressant meds that it sounds like you haven't tried yet, some of them are really good. You're doing what you need to do, be on top of things and keep monitoring your labs. How's your blood pressure? Keep a positive outlook and keep doing what you're doing. Best of luck to you!
Lori