Lupus symptons symptoms and conditions

Hi - I have been on prednisone now for 4 weeks due to a rash from an allergic reaction to sulfa. I started on the paks of 6/5/4/3/2/1 which I was on twice. That didn't work so my dr increased me to 60 mg for 2 days/50 mg for days etc. That didn't work so now I'm on 40 mg for 4 days/ 30 mg for 4 days etc. I'm not feeling confident that this will work either. The only side effects I had until this last dosage was the excessive sweating, increased thirst and urinating. However since I started taking this last dosage of 40 mg for 4 days I have developed the "moon face" which is horrible and insomnia. I haven't slept in 4 days. When I do fall asleep I wake up with the sweats. Also my vision has started getting blurry at times too. This stuff is scary. My dr didn't tell me about any of this - I have learned it from reading the drug effects and this website. I appreciate knowing I'm not alone. I hate being on this drug but it when I'm on the higher dose it does stop my itching which is driving me crazy too. I have been having mood swings too but I'm not sure if that is the drug or just from the stress of all of this. If this dosage doesn't work I don't know what else they can do but I don't want to have to go back on Prednisone again. I'm afraid what side effects will happen next and I worry about the long-term effects too. And please tell me the moon face will go away after I stop Prednisone... Thanks for listening.