Cinsider how much better position you are than some other peoples. There is peoples that are much worse postion than you are. Let go off these emotions and think and/or do something that makes you forget those emotions.
@Stormbolt. I do that and still they happen. thats why its such a pain to beat. Anxeity of a certain level becomes near automatic. Even if you logically know you should not be anxious your mind takes so much convincing that by the time the anxiety goes you feel really drained of energy.