I had sex on January 1st around 2:00 in the morning. He wore a condom but after he was finished, the condom wasn't on and there was nothing inside it when he found it. He pulled out when he needed to, or so he says, so all the cum was on the bed. He mentioned to me that he was only worried about PreCum. I ended my last period on December 27th and my fertile window began on the 31st, according to this app, and also it stated that on the 1st, I only had an 11% chance of getting pregnant. Anyway, I took the Plan B pill around 6 o'clock pm on the 1st so that means I took it within 16 hours after having sex. How effective should it be? I'm freaking myself out over this BUT I honestly think I am fine. I puked around 7 am on the first but I'm positive that was just from me working myself up so bad since it's nearly impossible to have morning sickness that soon. I hope someone can help me with this, please no negativity unless it's helpful. I posted this under this topic since Plan B is a type of birth control. My highest chance of conceiving is on the 3rd (27%) and 4th (33%) so I'm assuming the fourth is when I should ovulate.