Hi, you could try constantly sucking a mint. I had the same prob at night,i ended up propping the head of my bed up on bricks so even though it feels normal when you lie down your actually a bit propped up so the acid cant come up as easily. I still have it propped up now, lol!
Not long to go and it does dissapear immediately.
Nat, Aimee and 14wk jellybean x