J.M.
theres instructions on the pill package. I believe there are a few options (one of which is a sunday start , which is the first sunday AFTER your period starts, another option is to take it the day your period ends, and then you J. put the little sticker on each month to correct the dates on the package) but the first 2 weeks on the pill you're not protected so use back up percautions. Some dr's say the first momth you're not protected. All of this info should be in the leaflet that the pharmacy gives you, if not you can google whatever pill your taking and find instructions on the internet