Stressed? Aprehensive? Your feelings have nothing to do with what's actually going on. Instead, your subconscious mind is creating these feelings based on what it believes to be going on which, in turn, is based on the subconscious baggage that you've been carrying since your formative years. So if you're stressed, you're a couple of steps removed from reality. You need to clear your mind and be present. But there's no point trying this when you're stressed - you've got to get yourself in training...