painful

Cd 19. Been feeling like I'm on my period the last few days even though af isn't due til 8/3. cd 17 hubs and i dtd and my stomach felt weird. It's hard to describe. My stomach feels bloated and crampy several days now and while dtd it felt like everything was much lower than usual. A few times it felt like he "hit the end" of me, as far as he could go which is unusual. It was uncomfortable, slightly painful. then we dtd cd 19 and it was very painful, like a knife in my vag. Anyone ever have this before?