Leadingspartan,
I feel I need to try to give you some words.
Please forgive me my messy English, but I'll try to do my best.
All I describe here I was feel by myself.
At real war, not in simulators or games, if people hear sound and feel succusion of earth caused by far explosions of heavy weapons happens the next. You first mark for yourself: wow, explosion there is, good that not here, powerful so... Nothing special, war is the war.
Then, after 4-5 seconds appears something I cannot explain.
Even if you are very strong you start to feel uncontrollable animal fear.
Cold in chest, tremor, wish to lie down and hide head under arms.
You cannot move arm or leg and only wish you have - to hide yourself in no matter what hideout.
And again, you absolutely cannot control this.
Very disgusting feeling.
This is reaction of body, not your mind.
Mind trying to resist, but cannot, only very strong and experienced people can control this.
It seems to me you have same feeling from your life.
Remember, you are not guilty of this feeling.
This is only reaction of your body.
Try to control it.
Be strong.
You are not guilty.