Is it possible to get pregnant while on your period? If I had unprotected sex and began my period the same day, can I be pregnant? My period was on time and regular, but I have had a number of pregnancy symptoms since then, such as extreme fatigue, tender breasts, slight cramping, headaches, lightheadedness, and now some light spotting. I'm getting mixed information on this...if you ovulate in mid-cycle, and the egg only lives 24 hours, how is it possible to get pregnant late in the cycle. And if you ovulate late in the cycle, what happens to the egg during menstruation? Does it get fertilized during menstruation and hang around until the lining builds again so that it can implant?