I hate to be preachy because I hate being preached to, but hun, you HAVE to drink water!!! Exhaling PG takes a significant amount of water out of your lungs and you need to replenish it. If ya don't, and only drink caffiene, it's gonna give you hangovers that make your worst tequila and 151 hangovers seem like a joke. If you don't like plain water, drink it at room temperature, and chug it by the liter/quart. When you wake up, drink a liter, pre lunch break chug a liter, get home, chug a liter, thats 3/4 gallon and you'll be set. Or sub it for gatorade. Try flavored water or vitamin water? They're pretty good.
This has been a public service announcement brought to you by Jay.