Could Overweight And Acne Be Due To Hormonal Imbalance?

Hii i m 22 yrs old .i gt periods aftr evry 2 months.docter gave me gilleteb 35 for atlest 1 yr.bcoz hormones imbalnce is thr.she sd my pimples wil reduce.ill reduce my weight....is it true.an plz tell me ke wht more things wil hapen whn i tak ths medicine.is it adviceble.wht wil hapen if i stop this medicine.