So me and my boyfriend have been together for about 6 months and have been having regular sex. I got my IUD 8 months ago. Everything was basically normal up until a month ago. I was cramping up 8 days before my period started, which isn't normal for me. That's about the same time sex started to become painful. It's only if he hits a certain spot though. I think it's either him hitting my cervix or my right IUD string, because he says he can feel it and it goes straight down while the left is curled up. It's becoming quite a nuisance.