My period is 1 day late i had unprotected sex 9days to my due date and 5days to ma due date i took an emergency contraceptive. I don't know if i am pregnant.

Hello and than you for sharing. I'd like to sharing with you how EC works.

EC must be taken within 24 hours of having intercourse in order to be 95% effective.  When taken 24 to 72 hours after the effectiveness reduces to 89%.  Since you took it 4 days after having intercourse, the pill would not be very effective.  

The only way the know whether or not you are pregnant however, is by taking a pregnancy test.  The best time to take one is a week after a missed or irregular period. 

Faith