Are you feeling SAD already this year? Maybe not. It’s probably too early for full-blown Seasonal Affective Disorder. But as days get shorter, nights get longer, and the holidays creep closer, it’s not too early to talk about exhaustion. We all get tired, but sometimes that fatigue runs deeper than a few late nights. Experts say there are three overlapping kinds of exhaustion that can sneak up on you. At this time of year, you might be feeling all three. 1. Everyday exhaustio