Yes, anytime you have unprotected intercourse, there is the risk of pregnancy. The more frequently you have unprotected sex, the more likely it is that you will become pregnant.
Plan B helps prevent pregnancy by delaying ovulation. It is effective for one act of intercourse; it is not effective for multiple acts of unprotected sex done on multiple days.
If your next period is more than 1 week late, do a pregnancy test.
28. February 2012
anonymous-qa