How is Macbeth portrayed as being out of control?

Macbeth loses all control after Duncan's death. He cannot live with what he's done.... his conscience is filled with guilt.

When Macbeth returns from killing Duncan, Lady Macbeth is completely composed. She is filled with forethought and fear of repurcussions, and when her husband is unable to go back and cover his tracks.... Lady Macbeth acts in his stead.