Not sure if this is something to be alarmed about, but i've been noticing lately that i am all rundown and sluggish when i don't have any sugar in the mornings. I use to always drink a few cups of coffee black or with milk, every morning and still use to get tired. Whenever i had it with lots of sugar i felt different. But i stopped drinking it and feel sleepy all damn day until i have something sweet. So now i drink a bottle of powerade or gatorade before i get to school and it gives me such a kick and not as lethargic as i use to feel. Does this mean i have low blood sugar or something?