hello doc. i am 21 years. i get my period from 27th to 30th each month. on 27th i had an unprotected sex around 11 pm. the next day i took Postino II (emergency pill). it is past 30th (of may 2016 now), today is the 5th day of June 2016 but have still not had my period. last two days i thought i had menstruated only to realize it is a whitish milky cream. three days after late menstruation I took a pregnancy test and it was positive, on the same day i took another test but negative, in the evening i took another test still negative, two days later i took a test and still negative, have still not had my period. am afraid am pregnant since i have now gained admission into the nursing school and am to start in August.