Just got on bc this year. past 3 years had constant unprotected sex using the "pull out" method. i had reg. periods. why didn't i ever get pregnant?

Luck?: Unprotected intercourse for 3 years using only withdrawal without pregnancy could just b luck. It is also possible that there is a problem but the only way to know for sure would b to do an infertility workup. If ur periods were regular, that is strongly suggestive of ovulation. There could be a problem with your partner's sperm ( less likely if there have been several partners) or blocked tubes