Why do I feel sad about this?

So guys my boyfriend and I were intimate last night and normally we do it unprotected. He claims he has a strong pull game and it’s pretty strong if you ask me lol but last night was just different and he asked me “can I cum, just get the pill tomorrow” but I personally didn’t give an answer just because it was too good however, I did manage to get off but at the same time he kinda shot a rocket so idk if it did go inside or not. But After we were done , we started making jokes like “ima have your baby” stuff like that but then he comes and says “you said you were going to get a plan B” so today he went home and I stood home but he kept saying “you better not lie to me about the pill” as I’m like “chill out I don’t think you cum in me” and so honestly I was just feeling bad about the whole thing, so I went to the store and bought a plan b but honestly I cried because I wasn’t sure I was feeling like us having sex was wrong or something. I can’t even face him after drinking the pill. Am I exaggerating? How should I feel? Am I wrong?