Thirsty overnight

I wake up at night feeling like I've swallowed sandpaper, it's so bad that I gag. I drink water and I feel better, but it's a vicious cycle because the drinking water makes me have to pee again and wake up with the bad feeling. I end up drinking 2 bottles of water overnight and peeing at least 4 times a night. I'm 30 weeks. I passed the 1 hr glucose test so it's not GD, and I only drink 1 cup of coffee and water all day, no soda. Any ideas? Anyone else dealt with this?