Hitting of the cervix during sex is possible and discomfort can be felt - some times this is just how your body is made (or has become over time) and at other times it can be the sign of a medical problem... if the pain and discomfort continue please see your doctor for a checkup and pap smear - I did and it was as simple as having a few harmless cyst on the neck of my cervix that were bursting during intercourse.