I took the morning after pill a day after having unprotected sex. My boyfriend did not ejaculate inside me, his penis was inside for atleast a couple of seconds. Anyway I had my period a week later after taking the morning after pill. Which was unexpected because I had my period a week prior to having sex. Now my second period is 9 days late! I took a pregnancy test after having my first period and it came back negative. I took another 2 pregnancy test last week which also came back negative. I'm just wondering why my period hasnt come. Should I be worried?