decline in play after learning alot?

[chipbrave]

I have been playing over a year now, and for a while was doing very profitable. Have read, and reread all of the important books, and rally approached my game as a serious business. I felt that I certainly had reached a higher level of play, and my record seemed to be affirming that, but...

As of late, I have been loosing quite a bit. It has been so bad that I have decided to stop playing for the time being. Have any other serious players had a lull in their game after they reached what they thought was the next level? Is this a case of overconfidence leading to less concentration?

Any thoughts?