Plan b pill=abortion pill?!

Okay, so I'm 16 and just started having sex with my boyfriend. I'm not on the pill yet or anything so we would just use condoms and he would pull out... But the most recent time that we had sex he didn't pull out and the condom broke.. I was on my fertile week but I don't know if I was ovulating or not, so he was freaking out and what not and told me to take plan b.. Which I was really against because my mom told me that it is technically the abortion pill. But I wanted him to stop freaking out so I did some research and the things that I saw told me that it wouldn't cause an abortion, So I took it, but after I kept on reading about it and the more I read about It the more I felt guilty about taking it because some websites say that it does and some say it doesn't cause abortions.. So I wanted to get peoples veiws on it!