I have excessive thirst but my labs came back perfect. i am celiac and lactose free. no matter how much i drink i feel like it's not enough?

Excessive thirst: I trust you mean blood work to rule out diabetes mellitus was normal, need to make sure as well that you don't have diabetes insipidus, a rare condition in which the kidneys keep spilling water and not conserve it, but for either you would use the rest room a lot, another common possibility is anxiety or anxiety meds which can cause you to feel thirsty,or ? psychogenic overdrinking, rare