What Are The Chances Of Conceiving With Premature Ejaculation?

Hello,
I am 21, female, 5'3, 128 lbs, and I have discontinued birth control for about two months or less now. I had a night of drinking last Thurs... anyhow, my male friend put his penis in but I told him no since I didn't want to have sex. He stopped and that was it for the night. I did not really think about it until two days later, that I definitely should take the morning after pill even though it was just a second, I hear about the rumors of getting pregnant from pre ejaculation. I took the morning after pill about 2 days later. I am freaking out about getting pregnant. I am not due for my period for another week and a half.