WTF IS WRONG WITH ME

my boyfriend and I were just fooling around and we have never had sex yet, but he was pretending to put his penis in me but I stopped him. We did the normal like fingering and oral sex but I didn’t want to go all the way yet. After he pretended to put his penis in me, I noticed how Uncomfortable I felt and how much pain I was in. After he left, I took a look down there and noticed that my whole vagina is swollen like a balloon. Wtf happened? How to I get it to go away? It is so uncomfortable and painful to walk! HELP!!!!!! Also we were using zero protection