Steroids and birth control??

Abby

So I’ve had this rash for a month and a half and I’ve tried every at home remedy and creams to get rid of it but nothing worked. I caved and went to the doctor today and they prescribed me prednisone for it. I’ve never taken anything like this before and I’m supposed to get my period while I’m still on the prescription. Does anyone have any experience on what I should expect? Will it mess with my cycle? If I don’t get my period should I be considered? Mood swings? I know I should’ve asked the doctor but it was a male and I didn’t feel comfortable asking so please from one girl to another help me out!