OK. I've been drinking 2 or 3 cans of soda a day since I was like 5. Now I'm 19 and I realised that I need to stop. Well I've been dry for a week now. But since I've stopped I've felt lifeless and tired. It might be the sugar or whatever. I just feel kinda mopey. What should I do to stop this feeling...or at least what is this feeling. Should I go back to soda and how long untill I dont feel this way.