It was the last day of my period and my boyfriend ejaculated a little inside me and pulled out immediately once he found out it broke. A couple hours after the incident, we ran to the drugstore and got some plan b pills. The intercourse happened at 3pm and I took the two pills in the box at around 6pm on the same day - So it's safe to say I took the pills within the most effective 12 hour time frame. My periods usually last about 6-7 days, so my cycle is about 28-30 days which is the average cycle for most women. My question is, how effective is this pill in my situation?