Answer: Anxious
Step-by-step explanation:
I have found the answer and a little bit of explanation but i couldn't find the narrator's tone that is in you question.
The narrator's tone is determined by their choice of phrases that we can find in the text. "Does My Head Look Big in This?" by Randa Abdel-Fattah is excerpt that is showing us the tone of subject's thoughts, behavior and feelings. This narrator can't sleep because of the anxiety and overthinking because of the obsession with Adam's reaction about her going to school and wearing hijab.