Hi, I don't know what is going on with my body Firstly, my period came a week early and was lighter than normal although it lasted a week and I wasn't having bad cramps I missed a couple of my birth control pills I have sore breasts and feel sick, a

Missing pills. Missing birth control pills commonly causes a period to start early, and cause other menstrual irregularity. Anytime you miss more than one pill in a pack of pills, you should stop taking the pills, discard that pack, and wait until after your next period starts and then start a new pack of pills. If you are concerned about possibility of pregnancy do a pregnancy test, but it is unlikely.