1 No. You can not and will not have a period during pregnancy. 2  There may be spotting which may last 1-4 days and is normal for your first child or your fifth. 3  It does not matter. 4  If you think you are pregnant and have spotting then wait a week and test. A period is to drain your menstrual blood, lining and eggs, which in pregnancy are needed to protect the fertilized egg or eggs. 2  So there for you CAN NOT be pregnant and have your period. 3  I'll explain why some women THINK they are on their period.