Bleeding during sex.

Shonteera

So whenever I’m in doggy, or any position that I am bent over and he is behind me, I start bleeding. It has never happened when we are in missionary or if I am in top. Is it just because he is going too deep? He is about 6-7 inches when hard so I’m just curious if we do that position does it have to be gentle because he is hitting my cervix?