Why do I get nervous with people in authority?

I get nervous, for example I had a manager approach me the other day that I was talking for a few minutes. I told him that in the morning there was no one to help us and then later he said well that was in the morning etc so he basically just brought it to my attention he also noticed that I have been at my job for a few years now. He told me I should move up and come to the dark side. Anyways I asked him if he was good with resumes because I have applied and nothing. When I was telling him all this I got super nervous and the by the end he said don't be afraid and those words really got to me. I got teary eyed once he left. Why do people with authority make me so nervous, I was getting a bit shy and red in the face. I also wanted to cry. I feel like some of it has to do with my childhood. Not feeling like anyone cares to listen to me. I had that from my parents like what I say isn't important. Would like to hear anyone's perspective and how they manage to overcome this

Why do I get nervous with people in authority?
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