pain during sex

Does anyone else experience pain and extreme sensitivity "down there" when having sex with their partner? I'm 29 weeks today and it's been happening since I was about 12. It's more of a discomfort or tightness in that area... almost like it's overcrowded in there when actual intercourse happens and it's really lowered my sex drive :( I haven't really spoken to my partner about it but he's feeling like he's been missing out a bit in that department and I don't like him feeling that way. Has anyone else experienced this or know what's going on?