Generally speaking, the time that most women are the most fertile is 14 days after the first day of the last menstrual period. This is assuming that you have a 28 day cycle, which mileage varies on from woman to woman. There is a span of about 4-6 days before and after the expected ovulation date in which a woman is also fertile, because there is generally no way to pinpoint the exact moment of ovulation in each woman. It is affected very much by a wide variety of factors. Most women are generally not fertile during their periods, though very occasionally, very delayed or early ovulation can occur.
If you had your period one week ago, you SHOULD NOT be bleeding for reasons of period or pregnancy. In fact, ovulation should be taking place right now if things are running as they should, and consider that it takes another week or more for the egg to implant. You should normally get implanation bleeding when you are very near to having your next normal period. It could be possible that you tore a little during sex. It could also be possible that you are having problems with your reproductive system that are serious and immediately need a doctor's attention. I would see a doctor if I were you.
Also remember that a forum is not a pregnancy test. All women have vastly different symptoms in the very early stages of pregnancy and there is no way that anyone can tell you if these mean that you are or are not pregnant. The only way to tell is to go to the store and buy that test. In your case, I seriously doubt that you are pregnant. The timeline is just very bizarre if true. However, I will stress again that bleeding outside your normal period is definitely NOT normal and you NEED to see your doctor.
In the future, here is a good site to track your monthly cycles with:
www.mymonthlycycles.com . This is not a method of birth control, rather just a way for you to keep track of your expected period and ovulation dates. Remember to always use a condom, not just to prevent pregnancy, but also to prevent diseases.
