Do you have to miss a period to be pregnant?

Yes, if you are pregnant, you will not have a period. If you are having a period, you aren't pregnant.

NO I know from personal experience that you can still have your period even if you are pregnant, I had up till I was 5 months, my one friend had it the whole time and another had it for 8 months. My doctor ssys that this is common and not to worry. But you CAN HAVE YOUR PERIOD WHILE YOU ARE PREGNANT.