Supposedly being constantly thirsty can be a symptom of gestational diabetes, but that doesn't necessarily mean you have that. You could just be thirsty lol.
I am the same way. I'm 38 weeks 5 days. My 8 year old daughter told me of I keep drinking so much water my water will break bc it will be too much lol.
Nothing bad with that. If your body is asking for more there must be a reason why :)
Oh, & it's my 3rd pregnancy, and I'm 24 weeks