Well I'm actually feeling better today, so maybe yesterday was a fluke. Although I am suspicious that I may have mild S.A.D. It's hard to tell though. I definitely don't crave carbs or gain weight in the winter. Plus it could just be that on dreary days, I think more about whether or not my mood is down. On the other hand, I have noticed that I can have a lot more energy & less fatigue on sunny ones.