Anybody else?

Just had anal sex for the first time with my bf. I’ve done it before but my bf now is bigger than any guy I’ve done it previously with so it took a little more convincing and sweet talk to try it with him. We used a shit ton of lube and went slow and everything I was fine. We both were enjoying it but then after a little bit it started to hurt but I was still getting pleasure and I could tell he was loving it so I was fine with it. after we finished though I literally had this HUGE rush of emotion come over me and I just wanted to bawl my eyes out. I wasn’t mad or anything and he didn’t hurt me so it wasn’t from pain. I can’t figure out why I got so emotional after...has this happened to anyone else?