i hope i put this answer right, but if i dont alot of other ladys will explain to you better

There is a very low risk (like VERY low) of getting pregnant the day before your period. the blod was probebly due to having sex. the highest time you could get pregnant is 14 days after the start of your period (sorry i dont the technical way to put it)

Are you's trying to get pregnant, did you use contraception? actually...HAVE you been using contraception, because (qoute me if im wrong ladys) but if you had sex during that month with out contraception there is a much more likely percent chance that she is, and that the spotting is inplantation bleeding...but...i could be way off so your best bet is to test, is it comes up a neg then go see a doctor. her cervix could have been damaged. if my answer is not the answer you are looking for then....sorry

ok ill let the professionals take over from here, lol, i suck.

She absolutely can get pregnant the day before her period. Women can get pregnant any time of the month. That means we can get pregnant before, during, and after our period.

In a typical 28 day cycle, ovulation (when the woman is most fertile and most likely to get pregnant) happens around day 14. However, few women are like clockwork. That means our cycle might not be 28 days long, and we might not ovulate at day 14. Some women even ovulate when they are still bleeding from their period. Also, sperm can live for a few days inside the vagina. That means you could have sex a few days before she ovulates (becomes fertile), then that sperm could still be in her vagina a few days later when she ovulates resulting in pregnancy.

It is very difficult to tell when a woman is ovulating. Most women have no idea when they are. So protection needs to be used every single time no matter what unless you are trying to get pregnant.

The bleeding she is experiencing is probably her period or vaginal tears from being too dry during sex. If you two had sex for the first time tonight, it would be too soon for her to have implantation bleeding. If you two have been having sex before that, then it could be implantation bleeding. The only way she can know is to take a pregnancy test.

You can check out this site for more sex, birth control, and fertility related questions: http://www.coolnurse.com/sex_faqs_index.ht m

OK What about this. My last period was April 20/21 I had sex the day before My period in May 4 days later my test was positive.I started throwing up a few days to a week later that is alil too fast for me anyone have an answer.