After you stop birth control pills, it can take 6-12 months before your menstrual cycle beomes regular again. You may skip menstruation for a month or you may menstruate more frequently, everyone responds differently. You can easily become pregnant due to irregular ovulation. So be sure to use another form of birth control during this time period.
What you should know about not taking birth control would be irregular menstral cycles for about a year or longer again it depends on your body. What the health administraters don't tell us because they don't know is we all are different genetically so the teaters or proxys the used may have different abnormalitys
You no longer will be protected against pregnancy as soon as you stop. Your period may also take a couple months to regulate to your normal cycles. Your hormones will change too and you may see a difference in your libido, and moods.