I had the thirst too...
One night I went out and spent $50 on drinks, milk, chocolate milk, orange juice, water and a couple ocean sprays... I ate a lot of soup too...Everything I consumed in first trimester was very much liquid! It has decreased some but not completely...Before getting pregnant I never drank anything, was never thirsty so it was certainly new to me to be thirsty all the time. I still get thirsty now and if I feel the sensation then I need liquid NOW, it almost hurts if I dont get it right away.