Oh hun, you should really read the instructions, or have asked your doctor LOL.
Every pill has a 4 week (28 day) cycle, you take the pill for 21 days then have 7 days of not taking it when you will have a withdrawal bleed, which is the equivalent of a period. You then start taking the pill again on the 7th day for the next 21 days, after which you will have another withdrawal bleed (period) you only get one every 28 days, which lasts for about 4/5 days.
If you start taking the actual pill earlier, your period will end but I wouldnt really do that because it could mess up your cycle. Also if you are on your 7 day break from the pill I think its less likely to be as effective so if you and your boyfriend want to do the business then mayb use extra protection.