Sultana

This sounds a lot like depression to me, especially the sleeping business.

I think one can be an overall happy person, but have something bothering one that brings you down (hopefully) temporarily. It's important to apply oneself to discovering the root cause of why you are going through the period of unhappiness (or depression, or whatever is best to call it), and then do something about it.
Don't waste time telling yourself you shouldn't be unhappy, and that it's stupid, denying it, or whatever. Obviously you *are* feeling something, and that in and of itself is not a matter for judgement. It just is.
The following is kinda sorta my plan of action. I haven't gotten to the end yet, but this is what I'm trying to work with.

Identify what it is you want (as Gilda is doing here): Peace? Happiness? Contentment?

Evaluate if what you want is realistic or not. I guess a counselor of some sort may be able to help here.

Identify what it is standing between you and that: A lack of passion? Fun? Money? Whatever. Is it external or internal? I think it's usually internal.

Create a Plan of Attack (and by use of the word Attack, i mean be really proactive about it) to get it.

I think that for me at least, once I get the the Plan of Attack stage, I'm much better off.

By the way Gilda (and others), I've found this to be a really great thread. Such a simple question, with such philosophical and thoughtful responses! Thanks for having the courage to start it.

__________________
"Love is a snowmobile racing across the tundra and then suddenly it flips over, pinning you underneath.
At night, the ice weasels come." -

Matt Groening

My goal? To fulfill my potential.