Oh, I know what you're going through. I was a hard core Mountain Dew addict, but kicked that habit, too. I probably consumed a 12 pack in one day, myself. I'm glad I did, because it really did a number on my teeth and I ended up spending big bucks to fix what my MD habit did to my teeth. I have an occasional soda, mainly root beer. Mostly I drink water now. I find soda too be to fizzy for my taste now.
Good for you on getting through your first week!!!