Will you still get your period if you fall pregnant the day before your period?

Yes you can have a period still if you become pregnant before it, but the chances of that happening are slim. In a 28 day cycle ovulation takes place around day 14 -18 in the cycle and if the egg is not fertilized in that time the body will begin to prepare for a period. Sperm can stay alive in the uterus for 5-6 days, so if you had sex on day 12 of your cycle you could get pregnant very easily. Usually by the time you are ready to start your period all of this has all ready happened and the egg is no longer in the uterus and that is why you will have a period.