Act 5 Scene 1

It was night time at the king's castle where a doctor and a gentle women talked about the strange habits of Lady Macbeth's sleepwalking.  Then Lady Macbeth enters with a candle in her hand where she starts to talked about the murder of Lady Macduff and Banquo.  She claimed that the blood on her hands will never wash off.  The doctor doesn't dare to say anything on what he had witness today.

Reaction:
I was took by surprise in this scene.  In the earlier scenes, it shows that Lady Macbeth being someone who wouldn't get frighten over a simple matter of killing, someone who is strong.  In this scene, she acted as if she wanted to hide the fact she knew about the murder of Lady Macduff and Banquo, scared of letting people find out as if she was in some kind of illusion.

Questions:
Why didn't the doctor try to help her instead of asking god to?
Why is Lady Macbeth scared without her husband, without any power?

Predictions:
I predict that words will get out of what Lady Macbeth has been doing when she's sleeping walking soon.  Even if the doctor says he wouldn't tell anyone of what he witnessed.


Source

Extra:
The lines I was assigned are:
A. "come thick night,/And pall thee in dunnest smoke of hell (1.5.57-58)
"Hell is murky." ( 5.1.38)
The line from act 1 scene 5 is during the time where Lady Macbeth received the letter from Macbeth stating he gained the title of Cawdor and told her about the witches prophecy.  It was after that, where Lady Macbeth started chanting and getting her to become a demon to help Macbeth gain the throne.  When Lady Macbeth said "Hell is murky," she said it in a quiet yet frighten tone.  But in Act 1 scene 5, when she said the line "come thick night,/ And pall thee in dunnest smoke of hell," Lady Macbeth was speaking in a tone where she's more happy and greed as she was willing to get her body changed in order to get power in the kingdom.  In conclusion both of these lines are pretty much the same, since they both talk about what hell is like.