It is not possible to get pregnant after having intercourse, because at this time it is not yet time to ovulate, even if the sperm can enter the fallopian tube without an egg, the sperm will die naturally in about 3 days, so you will not get pregnant. Another point to note is whether it is menstruation or abnormal bleeding that occurs after intercourse. If it is menstruation, then it is basically the same cycle as the last menstruation and there is a small amount of bleeding after intercourse, then there will be a relatively large amount of dark red blood that follows, which is menstruation. If only a small amount of bleeding occurs after intercourse and then there is no more bleeding, this is abnormal bleeding and may be caused by cervical inflammation, vaginal inflammation, or cervical cancer, so this situation requires further examination.