After my school's open house caused me a near mental breakdown, my dad challenged me to write down what my anxiety is telling me is the worst thing that could happen, and decide whether or not it's worth worrying about.

Here goes.

If I fail the school year, if I fail the eighth grade, then my high school teachers will put me in the wrong classes, I will fail those classes, and then I will get into the wrong college, and I will fail that college and end up broke and alone with no money and no place to live. Then I will have ruined all my second chances, and have no other option than to end my own life.

That seems perfectly plausible to me.