Ask someone who is much older than you about their past and you will find that they remember some facts and experiences as if they occurred yesterday and they will be 100% accurate. That same person will encounter some facts and experiences that did in fact occur yesterday and the facts seem to escape them. And then there are facts and experiences that we all have that we happen to remember a little differently than they actually occurred. School was much harder or much easier than it actually was. Athletic accomplishments are usually much better than they actually were. The snow and the hills that we had to climb to get to school to have those athletic experiences where much deeper and steeper than they actually were. Life in general was much harder or easier than it actually was. Time erodes memory. Our memory doesn't hold on to the truth as much as we assume it does. This is to our benefit when it comes to unpleasant experiences that we want to forget. That is why the phrase "time heals all wounds" exists. However, time also erodes our memory and we forget how hard we worked to get to where we are now. You need to constantly remind yourself how hard you worked and how much time you have devoted to your training that has helped you to get where you are now. That memory should give you a strong confidence. And after you remember how hard you have worked and how much you have accomplished, take that knowledge and even work harder and smarter so that you may improve even more.