I am such a slacker

I am such a slacker I have barely done anything for three days and I know it and I regret it. So today I did three classes and for some reason I am wiped out and I don't know why because we did not work out that much in any of the classes and so I am perplexed. I don't know if I can do the rest of my requirements for today and I feel mad at myself for being so; well; tired.