Addicted to Coffee

Well, I'm addicted to coffee. If I drink less than 16 oz. of coffee in a morning, I'll have a huge headache in the afternoon and evening. I didn't want this to happen, but coffee is great! I'm trying to cut back -- but I really hate the headaches. There's always an excuse. For example, this week, I'm on-call at the hospital all week. Every night, I could get called in, so . . . of course I can't have a monster headache this week, right?