Cervix problem/sex problem

Okay, so I know I should remember this from my last pregnancy but I don't. I feel like something is scrapping my cervix or scratching it and it's extremely irritating. Is that normal or not?
And another thing, when I was pregnant with my son, until about the middle of my pregnancy I wanted nothing to do with sex and then the other half I wanted it all of the time. Now this pregnancy, in the beginning I wanted it all the time but now I don't want anything to do with it, just thinking about it makes me sick(literally I get nauseated) not to mention it's a little bit painful. Is this normal? My boyfriend doesn't seem to understand this because he think pregnant women want sex all of the time but I don't and he is taking it all the wrong way.

lol wow your boyfriend sounds like my fiance...tell him that yes it is normal and if he doesn't believe you he can go look it up...that's my Isaac ended up doing! It took over a month for him to realize that me not wanting to have sex had nothing to do with him and more to do with the fact that a baby had completely taken over my body! lol Don't worry once he figures out you aren't the only one who doesn't want it (i think it's kinda rare from what i have heard on here for any of us to actually want sex! lol)

Its completely the same way for me. When I first started out this pregnancy, I wanted sex continually, and now I can't even think about it. My fiance trys something at least once a day, and I have to constantly tell him that it hurts and it just isn't appealing at the time. He doesn't understand it, but Steff is right, just have him read something about it. Thats what I'm going to do.