Feeling of anxiety

I think this is something called adrenaline, if I know what is composed of, I will get rid of eating anything possessing this element.

OK, from the moment I am in the office, my heart is beating faster than it actually needs. I guess. An I feel myself is very tense - my shoulder is tight and I don't have any appetitte.

What's happening is that, I have numbers of obstacles ahead but I only have limited ammo, where and when should I shoot and what if I missed and what even if I shot it down and will I have a chance to win this stupid game?

I am confused. I don't dare to win and I don't mind losing, just give me a choice, OK?