A.N.
I had the same issue, but it didn't start until right after my first trimester ended, when I was finally feeling better. The dentist told me to brush without toothpaste if that helped, but I do remember it going away after a while, maybe a month or two. Oh, I think one thing that helped was doing it before I ate. Not as good as eating and then brushing, but when I had a full stomach, it was a lot worse than without.