Do not give up, consequences are too great. I would find another Dr. I have been told that kidney or lung biopsy is the best but those organs have to be involved for them to work. My husband and daughter thought I was crazy when I had those "green chunks" in my nose. So glad you mentioned it and now I know I wasn't. They did go away after I was diagnosed and treated. I did have very minor kidney involvement that I didn't even know about it and had the biopsy done on that. Have you had a full set of blood work done? I would guess yes but I know my creatinine level and a little blood in urine is what gave it away. Stuff you can't see but is there. I see a kidney specialist for treating my wegeners and he really knows his stuff. I also had problems with my eyes, red, watery, itching, scratchy. Turned out to be side effect or the prednisone and now a lot better once cut down my dose. Most all of my problems have turned out to prednisone side effects. Not sure about all the stuff you have done so far, but don't give up. Find someone who knows about this disease and go to them. Good luck!!