Lil sibling, angry gf/bf, toughloving parent;We're going to need more context to answer this.
Is your 11 twink missing on your character pannel?
Are you sure you're on the right account?
Have you been account sharing with someone who mightve had a grudge against you?
Have you been high recently and done questionable things?
Blizzard does not just simply delete a character from existence.
Did you try character restoration? You can undelete recently deleted characters.