You have asked a very common question, and an important one for all women to understand. Any bleeding during pregnancy is considered abnormal. Your menstrual period each month is triggered by ovulation and the production of progesterone. The progesterone support is then withdrawn and your period begins. Therefore, from a physiologic standpoint it is not possible to continue having a period while you are pregnant. While any bleeding during pregnancy is considered abnormal, it is not unusual to have some spotting early in pregnancy. You may also have some bleeding as a result of a break in one of the superficial blood vessels on the cervix. However, this should be rather minimal and should last only a short time. If you are pregnant, you should not be having any regular bleeding.