my Dr once advised me to take two pills instead of one or take the morning after pill within 72 hours. but if she wasn't ovulating chances r she can't get pregnant.
for the future thu, use a condom if u don't wanna go down that road. some ppl get pregnant while on the pill AND using condoms.
Birth control pills are not intended to work that way. BC pills work by preventing ovulation. They will not have any effect on preventing pregnancy after sex. Some Pharmacies offer Plan B which can be take up to 72 hours after unprotected sex that reduce the chance of becoming pregnant.