I started on the pill when I was 16. I wasn’t sexually active with guys yet but my periods were erratic and one of the benefits of the pill is helping make your periods occur on a more consistent basis. Everything was going fine until the summer after I turned 17 and unfortunately, I started feeling some unwanted side effects of using the particular pill I was using. I talked to my doctor and we both agreed that I should start taking a different prescription. The only downside is that I have to wait a little while so that the old prescription works its way out of my system.