It depends on when you ovulate, which (as so many people seem to claim) is NOT always a certain number of days before your period. Unless you have perfect cycles you can ovulate at any time, including right before and during a period. While the odds are not high, no one can say for sure whether pregnancy will happen. The only thing you can do is wait 2-4 weeks and take a pregnancy test with first morning urine.
no she shouldnt get pregnant. she has to be ovulating in order for her to get pregnat which is 14-16 days after you cycle.
she did not have sex during her ovulation time. so no. shes not pregnant. if she doesnt want to get pregnant or an std she needs to make sure that who she has sex with is weaaring a condom. that way she wont have to worry everytime she has sex that she is pregnant.
Although one of the most common signs of pregnancy is "absence of period" or "missed period", it is still possible to be pregnant and have a period. This is not as common, but can happen. Sperm can live within the vaginal walls for a couple days before an egg is actually fertilized, so with her starting her period the day after having intercourse, her chances of being pregnant decrease. If she is not in the state to become a mother, and she is looking for other options, she could consider alternatives such as, the day after pill (which can usually be obtained in a local health department). The best thing to protect against pregancy and STI's is protection (condoms) and abstinence.