Trying to figure it out

I am so dang depressed. I am not sure if it is the gray skies of winter or the cold or what, but I am tired of feeling tired, pudgy, and all around unmotivated. My husband is driving me crazy, the kids are fine but I have no energy to play with them more than a conversation - there is NO mama chasing kidlings in this household. I need to get out of this funk! I hate feeling this way...