He hit me too hard

last night I had sex with a guy I’ve been seeing and like he slapped me in the face which I consented to before and normally I like it but this time I didn’t see him about to do it and he did it extra hard like everything went black for a second and I burst into tears and he felt really bad but like I still have a headache from it and every time I think of it I want to cry and Idk I just want to be held by my mom but I can’t cuz she lives far away and idk why it’s making me so emotional I have been in an abusive relationship before although he never hit me in the face or anything so idk why that would spark these feelings

but I can’t really tell anyone what happened so here I am