Pain during sex

Petrolina • 2 October Princesses and 1 Chemical

My boyfriend and I have been together for 3 years and a half. When we have sex he always tends to go deep. Never to the point that it hurt me. But for some reason. Today while we were having sex it hurt when we was doing missionary. No pain during doggy or any other position just when i was lying on my back and he lift my legs up sharp pain in my cervix area. Has this ever happened to anyone else? Should I be concerned?