my gf usually starts her period around the 1st to the 4th of the month and we were just messing around a little last night on the couch and one thing led to another and we started having intercourse... she's not on birth control and we always use a condom and after about 20 seconds we decided that it was a bad idea that we weren't using protection so we stopped... i don't know if i precummed and if i did could she be pregnant? are the chances higher if she's ovulating? please help i need to know if i should get the morning after pill or not