Lately my periods have been irregular and I'm thinking about going on birth control to help regulate my periods. I'm currently a virgin and don't really see acne as a problem so I'll be using it solely to regulate my periods. Also, I'll be starting college next fall and want to be prepared if I do become sexually active. What should I expect in the first month(s) of starting birth control. Prom is coming up so I'm kind of concerned about weight gain and breakouts. Thanks!