What happened to Lady Macbeth in Act 5 Scene 1?

Lady Macbeth sleepwalks and hallucinates in Act 5 Scene 1. She is tormented by guilt over her role in the murder of King Duncan and cannot escape the memory of the crime. As she sleepwalks, she tries to wash the imaginary blood from her hands and expresses her fear of being held accountable. This scene highlights Lady Macbeth's mental breakdown and the psychological consequences of her actions.