Ethinyl estradiol / norethindrone
"I've been on this for 1 1/3 months (switched from Depo Shot) and I'm not sure I like this when I started it just 9 days in I got my period and at the end of the pack I didn't get a period and now I'm on week 3 of my second pack and no period like last month. So I'm a little worried and I get headaches a lot and my breasts hurt (this just started a week ago). If by the end of this pack I don't get my period then I'm going to the doctor."