I remember reading a book that I didn’t really understand at the time. I must have read it between 1993-1998 and it was about a girl who was always tired / chronically tired and at some point she has a surgery and gets better. I never understood (then or now) how the surgery helped/why she was so tired. The cover had the girl and she had brown hair and the background was purple / pink and I remember something about a rabbit / toys that she would imagine to be real? Like she lived in her mind a lot?
Lost Classics of Teen Lit: Name That Book! 