How common is it to have your period while pregnant?t period came 3 days early and it's unusual in color. It's almost black. I have all the pregnancy symptoms and are still having them? Help?

You can't have a period while you are pregnant. A period is the shedding of the uterine lining. If you shed your uterine lining you lose the baby.

Now, with that said, bleeding during pregnancy is common and there are many reasons for it.

Pregnancy symptoms and premenstrual symptoms are virtually identical. Have you taken a pregnancy test?