I've been a caffeine junkie for as long as I can remember. Sweet tea is like my water (it's a Southern thing
) and I drink about 5 cups of coffee a day. I'm never jittery and can have a cup of coffee and go straight to sleep. I do stay away from sodas though. They're LOADED with sugar and the carbonated water plays heck with my system. Sounds like you're getting your caffeine from sodas. Maybe try coffee and/or sweet tea instead. Even sweetened, they have much less sugar than sodas do. IMO, sugar provokes more addictive responses than caffeine so maybe what you have is a sugar addiction. Also, your kidneys will thank you if you get away from carbonated drinks.