Hi, I Was Have Sex With A Guy And His

Hi, I was have sex with a guy and his penis was bigger than I have had before. He was about to get it in me, it did hurt a bit but once he was in it was amazing. Then we cuddle, when I got up I noticed that I had blood all over him, me and the sheets. I cleaned myself up and used a pad. I was bleeding lots. When I got up in the morning I was not bleeding anymore. Why did I bleed so much havering sex!