"okay so im hoping you can help me because im really stressing out! I had my first ultrasound when i was ten weeks pregnant and it put my due date at february 4th and my conception date at may 14th and it said my LMP was april 30th...What is throwing me off is that i know my LMP was sometime before april 30th i just dont know exactly when...i have had a history of irregular periods as well....why im so concerned is because i had intercourse with one person on april 27th and than with another on may 12. i hope you can help because im reallly confused on who the dad can be!"

Even if you knew exactly when your period was, you will still have to have a paternity test done after the baby is born.

There is no way for us, or you, to know when exactly you ovulated. Also, sperm can live in our bodies for as long as 3-5 days.