Where's my mojo?

Right now I feel like I am the worst no-limit tournament player in the world. I played a few s&g on stars last night, and i didn't even come close to cashing. I feel like I have lost some of my aggresiveness, and when i do ratchet up the aggression, I invariably take the worst of it. I thought it was just a streak of bad luck, but now I really think I am playing poorly. Has this happened to anyone before? Any suggestions on how to get my mojo back?