I had sex on 6.22.2015, but my last period was on 5.21.2015 and it ended on 5.27.2015. But the thing is i got into a car accident and because of stress i started my period again on 6.5.2015 and ended 6.11.2015. My bf didnt ejaculate in me and we didnt use protection. It was my first time, is the chance of me being pregnant high? I dont want to be pregnant at a young age.. Please reply!!!!!