I've suffered from this as long as I can remember at least as an adult. Even in summer if there is a few days of rain and complete overcast sky I lose my energy and motivation. Then when I wake up one morning and it's sunny its like a new me, or the real me. Just a point I'd like to make for our community surrounding feeling like this for extended periods even when it is beautiful and sunny. Get your estrogen in check. Once I got my adex protocol fine tuned the difference has been dramatic in regard to my mood and energy.