Hi, I'm taking prednisone for 2 months already. I am not sure any...

Hi, I'm taking prednisone for 2 months already. I am not sure anymore if this pred is doing me more good than harm. I gained 20 pounds with a moon face filled with acne... It is so depressing because I never had problems with my skin and with my weight until I start taking pred for allergies. If I stop or wean down the dosage, then my allergies (hives) breaks out .Now, I feel so miserable and just want to stay home specially now that my students are noticing these horrible changes. I don't know how will I ever get back to normal again.