When me and my boyfriend had unprotected sex lastnight and i think i am on my fertile week,willl the emergency contraceptive still work and when could i take it? i had my period the 8th of august and it lasted 6 days and i my cycle lasts 28 days. so by calculating my time for ovulation, i found out that it would be the 23, however i don't know if it is true. i want a faster way to prevent pregnancy and would it still be effective to take the pill? because i know that at some risk, the morning after can speed up pregnancy.