SEASONAL MOOD SWINGS - WHY?

What is it about the change of season that rattles our cage and brings down that pall,that sense of hopeless useless feeling where motivation has abandoned us and we are sure there is nothing of importance left in our life. Nothing that can't go on fine without us. I hear the call of "doing nothing" -- a goal I have sneered at all my life now actually seems appealing. What is happening in my brain. Is it transforming into some new substnce incapable of innovative articulate and creative thought? Where hass the real "me" gone...I am being transformed into some vegetative state. It worries me...what if it doesn't change back..This mood is bleak...black...blindly terrifying if I think about it too much. But then that takes energy I don't have. Physically I am exhausted. I could sleep for hours. I have pushed...rationalized...argued with myself laying out all the reasons for pursuing my responsibilities...but my self is weakening daily as the season proceeds.

Is it the change of sun - less light, heading toward winter - seasonal affective disorder...is this what is happening... Do I need more time out of doors...a light box? More exercise outside? Someone enlighten me....I can't afford to stick around waiting for the next mood swing. I am aware of a number of us having this problem. Comments are welcome....I know one thing...it's not the meds...they have stayed constant..This started when the weather changed from hot and sunny to cooler and rain showers' breezy weather, cool evenings. Somebody explain this. Forward this to your friends....