| Have you actually gone outside into that sunshine? In the last few years, I've noticed that I get a fuzzy-groggy, de-energized feeling through some of January. It seems to be the time of year when I am least likely to get sunshine without deliberately seeking it. I think I probably have a very mild degree of seasonal affective disorder. But on any given day, all I need to do is go out and get some sun in my eyes for a few minutes. Even on cloudy days going outside helps. If it is really cloudy, I will just look up to the sky where the sun is obliterated behind clouds. It is as if I just have to collect up a certain amount of sunlight into my eyes.
On the other hand, if you really are dreaming all night, then you are not likely getting the quality sleep that you need. That can be rough on you.
You seem to be suggesting that there is somethng just under the surface niggling at you, something that is trying to get your attention to be "fixed" in your world where others tell you you really do have everything in order. You know, some people say that in our dreams we deal with certain things that do not get dealt with in our waking hours. So you might be working on an issue even in your sleep. But maybe it feels just below the surface because you do have everything else under control and are maybe ready to deal with the issue in a head-on, direct manner.
I've sometimes had periods where everything is going really well in my life and then an old matter will demand attention in my dreams. No kidding. It is as if, my brain has just held it on the back burner waiting for a time when there is nothing on the front burners! But it is still difficult to know what to do, other than just think it over consciously and tell my husband about it. Or sometimes tell my sister.
Maybe there is some unfairness you experienced that you need to fix or just declare out loud that it happened and was wrong. Maybe you were unfair to someone else and it is bothering you below the surface. Maybe, you are grasping for that one thing that you need to make perfect, but you've avoided it because it is too hard, or your need help and don't want to ask for it, or you can't bear what someone else thinks of you when you try to make that one thing perfect. Geeze, a million things --big and little-- could cause us to feel unsettled, unfinished, anxious, blue, etc.
Actually, I think the coffee is probably a good idea. Fine stimulant, that coffee. You could look into St John's wort, too, if this drags on for quite a few days. And there is always exercise. How about a swig of coffee and a pleasant walk in the sunshine?
Oh yeah, my Mom used to say "blue funk," too. WWII generation.  | 
