you have a chance to lose your money, you should be feeling something. I do not bet anywhere near over my head, and I consider myself to be a longterm winner, both in the past and future..... however I always am anxious when I put a play in. It is part of being human. However with that said if I lose I do not make a big deal out of it, and if I win I am happy but it is just another game. I really do not think there is any right answer, but a wrong one would be to let these feelings influence you into bad decisions or depression. That is when it is when you have a problem. Bad decisions involve chasing a losing bet or on the other end playing stupidly just because you won. It works both ways.