I have a dry patch in the back of my throat, it's very strange and it becomes painful to swallow, almost like something poking ny throat. This usually happens when I drink water, and the more water I drink, the worse it gets. Sodas do not make it dry, but I don't want to drink dozens of sodas a day, I would prefer to drink water, but I barely do because it always gives me a dry patch that becomes painful! It's very annoying! What is wrong with me?