i had sex with my bf on 28th june.i was expecting my periods by then but it was delayed.he dint ejaculate inside or near 2 vagina.it was 1st time i had sex,we jus tried twice but he couldnt penetrate,third time he penetrated into vagina,had a little moment.i felt very painful so he took out.it was jus for 20secs.I dint get my periods yet.i am very scared.will i be pregnant? plz tell me