Taking a stimulant wthin a short period of waking up can interfere with your natural waking process. That might be why you felt bad. Rather than quitting caff

Taking a stimulant wthin a short period of waking up can interfere with your natural waking process. That might be why you felt bad. Rather than quitting caffeine entirely, waiting two hours after waking (e.g. when you get to work) may also fix that dependency.