sir last friday ,i had an unprotectd sex for the first time in life ,he withdrew before ejacuation , n i took an i pill within 24 hours of having sex , n today that is one week and one day later i am bleeding since morning , what does it mean ,am i pregnant ?also i would like to mention that it was 21 january when my period cycle ended and it was 24b january when i had sex ?kindly tell me am i pregnant and if i am what medicines are to be taken ?