autoextrañarse

A rare, literary/psychological verb describing the unsettling feeling of not recognizing or feeling connected to oneself — appears mostly in philosophical, therapeutic, or literary writing, not everyday conversation.

• Tras la crisis, empezó a autoextrañarse, como si ya no se reconociera. — After the crisis, he began to feel estranged from himself, as if he no longer recognized himself.
• El poema describe el autoextrañarse del protagonista frente al espejo. — The poem describes the protagonist feeling estranged from himself in front of the mirror.
• Algunos terapeutas usan autoextrañarse para hablar de la despersonalización. — Some therapists use 'self-estrangement' to talk about depersonalization.

This is a rare, literary word — don't reach for it as a casual synonym of 'confused about myself'; sentirse extraño is the natural everyday alternative.