Chronic lung condition symptoms and conditions

I am on prednisone frequently for respiratory infections as I have a chronic lung condition. I was just hospitalized for a week and on 80 mg per day IV. I have tapered by 5 mg every 3rd day. I have a rash in my hairline and actually in my hair. I have blurry vision, insomnia, cravings for food, weight gain, puffy face, swollen stomach, and pain so bad in my left hip joint that I can hardly bear weight.
In Aug, 2008, I had my right hip replaced from avascular necrosis caused by steroid use for my lung condition. I am worried that AVN is now also in my left hip. The steroids take the swelling down in my lungs so I can breathe, however they are destroying my bones. I am so scared of another hip surgery. I realize that I need to be thankful that my joints can be replaced, but it is a horrible side effect of this drug.