I am in SO MUCH PAIN after sex

Me and my boyfriend has sex last night. As usual. We don't have it that often. We just started dating. And his dick is... huge. Compared to my last. I would tell him too deep and sometimes he would get carried away and I would have to remind him. Well I had to stop, I was cramping so bad. It was worse than menstrual cramps. And the next day I'm still cramping (we had sex at 4am) like right Bell my belly button, it's painful, it feels so heavy. Please help. It hurts to the point that I'm scared lmao