Sex during period

Hello I’m just a bit paranoid but I had sex with my boyfriend and he did the pull out method I was panicking so the next day I took the morning after pill. And after 2 days I got my period because I was due and that’s when I started my contraceptive pill. And during my period nearly to the end I had sex again and he did the pull out method again. I’m 100% sure that’s it’s imposible to get pregnant! Right ?