condom stuck inside!

hello guys this is the first time I'm posting. I was having sex with the boy and a had an amazing orgasm but I was so tightened that the condom got stuck inside, part of it was completely inside and a small part of it was outside and I'm not sure if some of his cum got inside. however this is the first time it has happened to me and I'm freaking out. do you think there's a possibility for me to get pregnant? the only contraceptive I use is condom and I'm afraid of taking next day pill.