Red and burning vag

my vag is a little red and it burns, I had sex with my bf, and it burnt a lot, his penis ended up swollen and red on the part under the head, it was like a ring, and my vag was swollen too, now is almost gone, but it's still red and burning, his penis too, is it bad or is it normal? I had itching for a few days before having sex, did I pass something to him? I had itching before, but never gave him anything, I didn't have sex with anybody else 😖 I'm scared