If it has been determined that the fertilized egg is implanted, it means that it is pregnant, but if it is only based on vaginal bleeding, it can not prove that it is pregnant, and there may be ovulation bleeding, bleeding between periods or bleeding caused by gynecological inflammation, which needs to be closely observed. Generally speaking, the fertilized egg will be implanted in about one week of intercourse during the ovulation period, and a very small number of them may have a small amount of vaginal bleeding, and at the same time, combined with lower abdominal distension and pain, you need to closely observe whether it is increasing or not. To determine whether you are pregnant, you can take a blood test for HCG ten days after intercourse at the earliest, and once diagnosed, you will need to take further tests to determine the intrauterine pregnancy and assess the development of the embryo. During the period of bleeding, forbid sex temporarily, pay attention to vulvar hygiene, avoid exertion and emotional excitement, which will be conducive to the fertilization of the egg.