What thoughts go through Juliet's head about Friar Lawrence giving her the potion?

Juliet wonders.....

what if the potion doesn't work.....

will she end up having to marry Paris- no, the knife will take care of that problem....

what if the Friar purposely mixed the potion to kill her rather than simply put her to sleep.....

what if she wakes up before Romeom arrives....

what if she suffocates in the tomb....

what if there are ghosts, or stench, or terrible screams?