Ever be a child be afraid in entering class during first days? I think they are, they do. They cry a lot, because they are scared of leaving the side of their mothers and staying in a room full of strangers that they don't know what might happen to them and having only one guardian to look at them but that only happens on the first day and its normal.
As those kids gets accustomed to the daily routine those fears turned into excitement and laughter, they prefer more in going to school with their classmates than staying inside their house. As they grew old the fear is completely gone, well, unless a child transfers to a different school or is being bullied but it still don't last that long, i guess.
The problem is I am already a mature being having the capability to work and to earn for a living yet fearing to enter the first day class. I am older than them, I experience more things than them but the fear that i had to sit in a room full of people who has a lot of expectations from me, since they know that i had gone far from what they have and i already had the subject before. I feel like I was that kid from before, the me 12 years ago, even though i already know them i still don't know what might the expression they will give me, how will i communicate with them, or they will misunderstand my situation. It fears me, it kills me having the thought of it.
I hope it'll be just during the first days of class.