i’m tired of not being able to take dick

everytime were in missionary and my legs are all the way up on his shoulders and he’s going fast and hard that shit gets overwhelming and my body just naturally pushes him off idky. how can i make myself handle it. and i know for fact that he shouldn’t be hitting my cervix but he keeps doing it cause i think it’s boosting his lil ego. but that shit is destroying me. i just can never take dick and it’s mood ruiner honestly.