If things aren't Peachy, can they be Potato-y?

Spent my day (or the few short hours I have after work) thinking about depressing things and doubting what I know is solid. It lead to a very depressing evening. I'm usually the fly-by-the-seat-of-my-pants kind of girl, but today I backed up a bit and started asking myself where my life was headed and if I liked the direction its on now. I could just feel my care free way of thinking slipping away and a very dark reality setting in. What should I do? For once, I am unsure of myself and feel self conscious, it's a terrible feeling. I'm hoping it goes away soon!