The magic potion worked Juliet appears dead sadly for the nurse she doesn't know about the potion so she is in utter shock
I must needs wake you; Lady! lady! lady!Alas, alas! Help, help! my lady's dead!O, well-a-day, that ever I was born!Some aqua vitae, ho! My lord! my lady!
There is thy gold, worse poison to men's souls, Doing more murder in this loathsome world, Than these poor compounds that thou mayst not sell. I sell thee poison; thou hast sold me none.
The letter informing Romeo about the plan did not get to him in time so when Romeo finds out that Juliet is died he thinks she is really dead and wants to be with her forever so he goes to a man and buys a poison that can kill a strong man with just one sip
Put this in any liquid thing you willAnd drink it off; and if you had the strengthOf twenty men, it would dispatch you straight
Here's to my love! (drinks the poison) O true apothecary, Thy drugs are quick. Thus with a kiss I die.
Romeo kills himself with the poison right before Juliet wakes up Juliet sees Romeo dead and she kills herself with a dagger and just like that Romeo and Juliet were both dead for real.
I do remember well where I should be,And there I am. Where is my Romeo?... Then I'll be brief. O happy dagger,This is thy sheath. There rust and let me die