hi, im 17, and on on monday, january 13, 2014, me and my boyfriend were fooling around and we ended up having unprotected sex, however, before we did i checked if he had precum and he did not, and he was in me for about less than a minute because we were uncomfortable without a condom, and he pulled out without cumming. my periods have always been irregular and i doubt that i am pregnant, but my period is supposedly 3 days late. have been stressed a lot recently and i dont eat regularly, but i have been taking vitamin c and drinking a lot of green tea to induce my period since yesterday. but even so, is there any chance of me bring pregnant at all?