HELP!! According to an ovulation calendar, I ovulated on a Wednesday or Thursday (depending on which calendar you look at) and had unprotected sex on Friday around 4 pm. I wasn't able to take the Plan B One Step pill until Monday at 9:30ish in the morning. What if the egg was already fertilized? IF it takes 7 to 10 days before implantation, I should be ok right? The pill prevents implantation?? SOO SCARED!