hiiii.i had sex wth my bf a couple of times nw.i had taken ipill within 72hrs bt my periods hve nt occured.i m tensed am i pregnet or there's nthng serious abt it.last time when he entered his penis in my vagina i felt a pain.it ws merely for a min.than i found some blood in my vagina.and after that i had no blood flow.pls tell me wht to do.is there chances of being pregnat.i had taken i-pill after every course within 72hrs.plssssssss reply me soon.