Anyone know why??

I had sex with my bf, he’s the second person I have slept with but he’s much larger and more rough then my first, we have had sex before but the morning after the last time we did I was super sore down there and when I peed it stung like it was cut or something? And I’ve been super itchy down there too. I always make sure to pee after sex and shower too. Has anyone had this before and can tell me what’s happening??