hello helena. i was expecting my period lastweek wednesday but it didn't come. i had unprotected sex with my boyfriend on thursday but i took postinor 2 on friday. my period didnt come early so i was worried. my period came on monday but it stopped so i did a pregnancy test at home and it came out negative. but as at yesterday, my period is back to normal. should i still be worried? please i need to know whether i am pregnant or not