Pain during ?

alrite so i got a question..hopefully sum1 can help me out wit before i decide to bring it up to my girl. so when me and my girl have when shes on top it feels like sumthing inside of her is scraping my . im wondering if this could b her cervix? now ive had wit other girls and ive felt the same type of hard bony type tissue in there with my fingers at times or even my but this usually happens when u go in pretty deep. now with my current girlfriend i could feel dat same type of hard bony type of tissue lol however i would say i feel it about 2 inches deep into her ..so im wondering first of is this da cervix ive been feeling wit other girls and now also my current girl and if it is...is this what could b scraping my when im inside her...ive noticed this only happens when shes on top. well just wondering if theres anything i can do to fix this because it is rather painfull to the point were last time after we finished i could see my had a small but noticable cut on it from were it was scraping. hopefully sum1 has an answer to this. thanks in advance