Lots of threads about anxiety so I’ll be blunt: it is not a selling point in college admissions.
If you’re wise, after you write, you will have an English teacher or savvy adult read it and make suggestions. Awful when an adcom comments a kid can’t spell or that they can’t follow the essay, it rambles, repeats or contradicts itself.
Name some good things that happened- you learned something about yourself or others, you tried something new and it worked, etc. Get ideas, then you block it out in written form. Try to pick something that shows how you changed for the better, the efforts you make now to do some good
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Oh, and this: when you write this, imagine it’s a note to a trusted adult, letting them know something and how it affected you. In that, you wouldn’t drag in every single detail (“and then this” “and then that.” or pontificate.