I am not a great pool player. I am ranked as a strong BB in Michigan. I play league pool twice a week and find it very interesting when a player has a chance to beat me but at some point in the rack he realizes where he is and what is happening and I can see his arm start to shake and he hits a ball really bad and lets me in. I believe this is very common, most players cannot handle pressure because they play for nothing all the time. 2$ a game and eventually you should get tired of the 10$ to 20$ nights and start learning to play safe and steady your nerves. To handle pressure you need to be under pressure over and over and eventually your stroke will hold.