Sex...

In the beginning of my pregnancy, I was always super aroused pretty much all the time. Now, at almost 39 weeks, I still get super aroused, but I can't have sex...
For the last few months it hurts when my boyfriend and I do it. It hurts like I'm dry, when in all reality, I'm not dry AT ALL. I'm cleaning regularly and my discharge doesn't show any signs of anything wrong and I never hurt at all until after penetration.
Has anyone else had this happen?