Thirsty at night

Pauliny • 28 years young. Have an 8 year old daughter and expecting Noah in April.
I drink water all day. Get up at 6am and start drinking water. Around 8pm I stop because I don't want to be getting up all night to pee. I already don't sleep because I am 30 weeks and very uncomfortable. But I get sooooo thirsty at night. It's barely 10 and I feel like I'm going to pass out from dehydration. Is this normal?