Lady Macbeth is nervous and is in a heightened state, but she is able to keep her goal in mind and maintain her composure enough to help her husband regain his composure when they hear someone knocking at the gate. It is clear that she is in a heightened state in the first 30 lines or so. She and Macbeth have a quick exchange about noises heard in the castle as Macbeth killed Duncan. She regains control of herself quickly though and less than 50 lines later, she chastises her husband because he says he feels regret for what he's just done. She is the one then who takes the bloody daggers to plant them on the sleeping guards She next tells Macbeth that they must calm themselves and appear normal to whomever it is who is at the gate. She tells him to get on his nightgown and to compose himself. She appears to be in complete control, but Act 5 reveals that her composure was short-lived as she is insane by that act.