Birthcontrol /emergency pills

Patient: I have been on yasmin contraceptive for atleast 3 months then was off for three months and i began another pack on sunday 17th aug 2014 which was the first sunday after my periods. i had unprotected sex on saturday 23rd aug 2014 at around 4pm in the evening and i usually take my pills at 10.45 pm in the eening…i still took the pill for that day at my normal time…could i get pregnant?and do i have to take e pils?

Symptoms: Headache