I had unprotected sex a week before my period is due . The last day of my cycle was on April 1st , so it ended on the first . I normally get my periods every 30 days and it is always normal IT'S NEVER LATE . I was due for my period on May 1st and I still haven't got my period . Is there any way that I could be pregnant? Do you ovulate a week before your period is due ??