Major fear of pregnancy help

Leah

Okay so my and my boyfriend just had sez for the longest time, I guess he came and me being me slowly continued to ride him for like one extra minute and well, when I got off i noticed the condom wasnt on his dick and I ended up pulling it out of me, he got self conscious I guess and wouldn't let me check if any cum got out and now I'm kind of freaking out, I'm not on the BC, however, the last shot I had was mid July if that does anything. And no he did not pull out when he came, if I took the morning after pill tomorrow or later on today I should say, what would my chances of pregnancy be then?