If you have access to purchase BOW & ARROW HUNTING MAGAZINE in their April 2003 issue they have a very informative article called TRIGGERING THE SHOT ( BY JOE BELL ). This article deals with target panic, punching the trigger, back tension releases,holding on the shot and what I believe to be the most important aspect of all the mental part of it ( the subconsious shot and shooting under pressure) etc.Sounds like it would benifit you to read this article, it contains lots of info and helpful advice and solutions to some of your problems.3D Bowhunter Magazine also has a great article on dealing with shooting under pressure.