Your confusion—use it to enter confusion's mind. Let your character understand because you lived inside that great human ball of it, and claimed your piece.
You can document soundscapes in the backyard via black ink. Those sounds are yours too.
The screaming baby—use it to be grateful you're childless.
The past—use it to remember the present exists. You're alive. This isn't over.
Homework, home country—use them to remember high school photos, darkroom hours. The one-act play you taught.
Your disappointment with humanity—use it to remember disappointing yourself and how you forgave yourself too.
We are forgiven.
You are forgiven.
You can use it, all.