[Surviving]

You guys ever been having a great day, and suddenly it feels like you were hit by a cloud of depression? I would understand if I was already having a bad day, but it seems like every time my day is going good, or I feel an ounce of happiness, a wave of sadness just crashes on to me. It makes me feel as if nothing will ever give me permanent happiness, I start thinking about everything wrong in my life at the worst moments, then I just feel like a drag.. I feel like im dragging everybody down around me. I get angry, easily frustrated, and very sarcastic, and mean when I get this feeling. Anybody else get this?