Does this sound like a sugar or vitamin problem?

Yesterday I felt bad, sluggish tired alittle weak so when I came to work I ate a cheeseburger and fries felt the same for a couple of hours then I drank a gatorade and it made me feel better . I figured if it was sugar I would have felt better after I ate, but I know gatorade has a lot of potassium in it so maybe that could be it, any serious opinions?