Anytime you have unprotected intercourse or a method failure (condom problem), there is the risk of pregnancy. It takes at least 7 days of consecutive used before the birth control pills are effective.
If the semen did leak only on the outside of your vagina, and you cleaned yourself immediately after, the chance of pregnancy is unlikely. However, it is not impossible, as some semen may have leaked into the vagina.
Continue taking your pills correctly & consistently. If your next period is more that 1 week late, perform a pregnancy test, either at home or in a clinic.
3. February 2012
anonymous-qa