so thirsty!

I am constantly sipping water from the time I get up till I fall asleep even unable to fall asleep because of thrust. if I don't take a sip of water every minute or so I start to feel faint and sick to my stomach. this never happened with either of my other children. I have even had dreams I'm dieing of thrust no matter how much I drink the feeling will not go away. I'm 9 weeks along this happening to anyone else? first doctor appointment a week from today.