Is drinking 14 cups of water with hashimoto's and adrenal problems bad?

Well.....: Is there a reason for drinking 14? If the goal is keep your self hydrated, then anywhere between 1.5-2 liters of water daily is adequate if your an adult and in moderate temperature environment. Remember, too much of a good thing is harmful even if it's water ! (you migh want to discuss this with your endocrinologist especially if you are taking florinef).

Water intoxication: It depends on how big the cups are. If they are bigger than 4oz cups then 14 cups per day is way too much. It can lead to significant electrolyte abnormalities which can have significant effects with regard to the above mentioned problems. Cut back the water intake to 1/2 of what you are currently doing.