Moving and going to a brand new high school in a brand new district where I didn't know a single soul. The fear was substantial and confirmed upon my first day of my freshman year. I did not belong in that district, around those people, in that system. I needed to be at my quad-A school, with my friends, in the neighborhood I knew and loved.
But, if I hadn't moved, I never would have met the love of my life. So, it's all a wash now.