Dec 4, - Now I'm pregnant again.. this time around I had unprotected sex 4 days before my period. Even if you have intercourse on the day you expect to ovulate, you might conceive for another 24 hours depending on when exactly the egg is released and when the sperm reaches it. Apr 17, - How often do you need to have unprotected sex to get pregnant? Can you get pregnant on your period? And, when should you have sex.