answer:Who me? Are you crazy? Never had a cloudy day in my life! What brings it on? Are you having one of those random, no reason for it, bad days where all of a sudden you are depressed or something? I wish I knew. They happen out of nowhere for me, sometimes, and I search for explanations and can’t find them, and then, when I’m lucky, they are gone after a few days. Or weeks. Or sometimes, years. The only story I have for you is that it is a change in brain chemistry. Otherwise, it makes no sense when there is no external cause for it.