No, I believe it's normal. I'm 31+4 and hubby and I still try to have sex when possible (though not nearly as much as we used to). Lately though I have horrible pain and pressure and it feels like I have huge cysts on my ovaries that are about to rupture. I asked my doctor And he assures me that it's normal to have pain during intercourse this far along. In just ready to be back to my normal self again!!!
Yes its normal and no it has nothing to do with it being a boy. Youre so swollen down there from the increase in blood flow concentrated there to prepare for birth that it can be very painful to have sex.