I'm 5 and a half weeks pregnant, and from even before I knew I was pregnant, I've been really thirsty. I keep drinking lots of water, so I don't think I'm dehydrated, but it's so bad that I can't sleep for more than a couple hours at a time before I wake up really dry. Is it just because I live in a cold, dry climate, or is it a normal symptom of pregnancy? Is anyone else this thirsty this early on (I've read about thirsty being a sign of gestational diabetes, but I think that only starts later)?