I would believe that everyone at some point when they began to carry concealed felt the same way or had similar experiences with it. Over time though as others have said, that feeling will diminish somewhat. I have felt the same way when I began to carry.
It is a great responsibility to carry something capable of taking life in less than a heartbeat, it is not a toy or something to take lightly, that's the way we all treat it here. You are on your way however to being comfortable with concealment.
Your post is excellent, sounds like you are willing to use a firearm if need be, but you are also aware of the responsibility behind it's use.