I think it's pretty normal. Last pregnancy I mentioned it to my midwife (felt kinda burning during and after BD) and she wanted to rule out the risk of yeast infection and made me do a course of Monistat. I only made it through 3 days of it because I think I was allergic to the cream--it really hurt to put it in (I have never had a yeast infection before so never done that previously). Anyway, I stopped using it and we also didn't BD much more there, and it wasn't an issue anymore. We used Astroglide when necessary.
This time around I have the mild burning sensation some but I'm not going to mention it. There are no other indications of yeast.