What can you infer about juliet from the line in bold?

juliet
i have a faint cold fear thrills through my veins,
that almost freezes up the heat of life:
i'll call them back again to comfort me:
nurse! what should she do here?
my dismal scene i needs must act alone.
come, vial.
what if this mixture do not work at all?
shall i be married then to-morrow morning?
no, no: this shall forbid it: lie thou there.
what if it be a poison, which the friar
subtly hath minister'd to have me dead,
lest in this marriage he should be dishonour'd,
because he married me before to romeo?
i fear it is: and yet, methinks, it should not,
for he hath still been tried a holy man.
how if, when i am laid into the tomb,
i wake before the time that romeo
come to redeem me? there's a fearful point!
shall i not, then, be stifled in the vault,
to whose foul mouth no healthsome air breathes in,
and there die strangled ere my romeo comes?
or, if i live, is it not very like,
the horrible conceit of death and night,
together with the terror of the place,—
as in a vault, an ancient receptacle,
where, for these many hundred years, the bones
of all my buried ancestors are packed:
where bloody tybalt, yet but green in earth,
lies festering in his shroud; where, as they say,
at some hours in the night spirits resort; —
alack, alack, is it not like that i,
so early waking, what with loathsome smells,
and shrieks like mandrakes' torn out of the earth,
that living mortals, hearing them, run mad: —
o, if i wake, shall i not be distraught,
environed with all these hideous fears?
and madly play with my forefather's joints?
and pluck the mangled tybalt from his shroud?
and, in this rage, with some great kinsman's bone,
as with a club, dash out my desperate brains?
o, look! methinks i see my cousin's ghost
seeking out romeo, that did spit his body
upon a rapier's point: stay, tybalt, stay!
romeo, i come! this do i drink to thee.

she does not know how to prepare for problems.
she is prepared in case the potion does not work.
she has not given this plan much serious thought.
she secretly wants to marry paris in the morning.