LAIDES HELP!

OKAIE! ME AND MY BOYFRIEND HAD SEX LAST SATURDAY AND ITBHURT WHICH IT NEVER HURTS!! WELL THE NEXT DAY I WAS HAVING LIGHT BLEEDING AND IT LASTED FOR 7 DAYS BUT WHEN I HAVE A PERIOD ITS ALWAYS HEAVEY AND I HAVE BAD BAD CRAMPS WELL MY PERIOD PAST ITS 4 DAYS PAST AND NOW IM,HAVING THE BAD CRAMPS PERIOD CRAMPS BUT MY PERIOD ENDED 4 DAYS AGO IM SO CONFUSED ANYBODY?? WENT THRU THIS AND FIND OUT THERE PREGNANT AND ALSO I'VE NEVER BLEED THE NEXT DAY AFTER SEX