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the cells that are normally on the inside of the cervix, some of them made their way to the outside of the cervix
I have been told I have this too, and back then they called it cervical errosion (although that's not accurate in describing what's actually going on). I bleed after pap smears, sometimes quite a lot. Sometimes I bleed after DTD, whether pregnant or not. Those positions where penetration is deeper will make it more likely your cervix will get knocked about. I tend not to worry any more - I just wear pads for about 12 hours and it stops.