sore after sex?

so when me and my boyfriend have sex it feels good but if he stops to like move a blanket or something and doesn’t pull out when he does, it hurts. and when he does pull out i’m fine but after when i pee, it’s sore when i wipe where he goes in at, and sometimes there’s a bit of blood? any idea why? he doesn’t force me and he’s wet and so am i so i can’t our why this is happening? any ideas why or how to help ladies?

also, it hurts toward the bottom of my hole. like near my butt. could it be that he needs to move himself up more, and that’s why? because he’s possibly like, ripping me?