Afternoon Fatigue

[jasonibs9]

So do any of you get this afternoon fatigue that lasts usually a couple hours a day?  For me , it happens on my work days usually since I average about 5 hrs sleep a night.  It can be a major pain to pull through some times because if you are at work , you can't just fall asleep at your desk.  What I dislike the most about this is I'll get some negative thoughts in there that will lower my confidence.