Dr. i had an unprotected sex with my bf yesterday and took an i-pill after 10-11hrs. i have irregular menstural cycle due to which i am unable to judge my ouvialtion day. i did sex for the first time and he even pulled out but i think some of his sperms went into my vagina. my last period date was 20th dec ant we had sex on yesterday that is 8th jan. i dnt want to get pregnant what are the chance of getting pregnant??