Slump?

I played in a couple of tournaments today. Very disappointing results. I played very poorly. I was pumped to play because practice went very well, but I really played bad. I guess I was a little tired and didn't play out the runouts very well. I don't remember a whole lot from the matches, and I missed some shots really bad. I was talking to my friend tonight and I felt very dizzy and felt my head spinning for a second. Scary. I better go to bed now...