i had sex with my bf on 22 of Dec.it was an unprotected sex but he didn't ejeculate in vagina...he pull out.now my my periods are missed and my expected period date was 27 Dec. my cycle was regular about 28 days.now i have not feel any problem.only my leg getting pain. i didn't take any pragnancy test.i have no period...i am worried...i don't want to be pragnant. what can i do... plz help me...