it is ok to start mid-cycle. but you are not protected from pregnancy until you have taken the pill for at least seven consecutive days. it is also likely that the pills may change your cycle. you should expect to get your period about three days after you finish the active pills in the pack. in the meantime you may notice some breakthrough bleeding or spotting since you started right before your period was supposed to come. talk to your gynecologist if you notice anything new or unusual.
was it ok to take my first pack of birth control pills before my period came instead of the sunday after it started?