I have this terrible taste in my mouth that will not go away, no matter what I eat, drink, brush with, gargle with.... It's kind of a sour taste. My diet hasn't really changed, so the only thing I can contribute it to is pregnancy. Did anyone else experience anything like that? Does it ever go away - like is it one of those "you'll have this in the first trimester but then it gets better" type of things? I really hope so. It's kind of making me sick!