Nah.. If I'm not mistaken, coffee can make you feel alive, it lifts you up and gets you awake.But since you said that you take 6-7 cups in just 7hrs work, I believe thats bad. Because caffeine is mildly addictive and maybe you were tipped off to this because you've experienced some of the signs of withdrawal from a caffeine addiction:
- sleepiness
- feeling overtired (from not having had any caffeine to energize you)
- a terrible headache (when you abruptly stop having caffeine regularly)
Maybe you could just reduce coffee intake to a cup a day? But you know what? in the long run coffee ( or anything else containing caffeine like those soda) is not good for your health.. So better get rid off it.