I seem to have lost confidence in myself where I am thinking of negative thoughts during training (Wing Chun)......im thinking to myself especially whilst doing chain punches that I will not be able to pull this off in a real life situation, I read this article once that said keep the punch on the body for an extra few seconds because this hurts the target more...I was doing this anyway but now I cant seem to do it, its almost as if by reading it im doing the opposite.......im rushing through the punches to much.........I cant seem to get this negative talk out of my head...........I feel im not putting the right amount of power into the punches..............are there any psychologists especially sports psychologists online who can help me? Or better still can you guys help me? Its seriously affecting my training........the only person who is holding me back is myself.