Get you some lube, mama! You're gonna need it for after anyway because the hormones change and dry us up.
I can't say it's 100% normal bc in my case, I just don't want sex at all. But I do know that the change in hormones can have an effect on all sorts of things to do with your sexualness. Just try not to stress it too much until after you deliver. In the meantime, just be happy you still have a sex drive and go buy some lube. I recommend Ilube or Wet Platinum.