In my earlier years, I was wracked with worry when I teed it up! If I entered into a competition (friendly or serious) forget it; I would seize up for a hole or two until I hit a few good balls and had time to relax. Of course as time progressed and my game improved, I started to worry less and less. This does not mean that I do not have any worries, but any fears about my general game is overruled by my mental game.