If pregnancy is confirmed, you will not have a period that month. If you have vaginal bleeding after pregnancy, this is not a menstrual period and may be a biochemical pregnancy, a preterm miscarriage or an ectopic pregnancy. The time of pregnancy is calculated from the first day of the last menstrual period, and you will not have a period after pregnancy for the entire gestation period. If you experience vaginal bleeding after pregnancy, you should go to the hospital promptly for examination. If it is a preterm miscarriage, you can undergo birth control treatment; if it is an ectopic pregnancy, you can start with conservative treatment, and after the failure of conservative treatment, you can take laparoscopic surgery; if it is a biochemical pregnancy, it is equivalent to having a period and there is no need to keep the pregnancy. After pregnancy, you must pay attention to rest, no sexual intercourse and no strenuous exercise during the early trimester.