Delay this marriage for a month, a week.
Or, if you do not, make the bridal bed
In that dim monument where Tybalt lies.
: I believe this is Juliet saying, delay the marriage or I would rather die
I’ll to the friar to know his remedy.
If all else fail, myself have the power to die.
I think this means that she is gonna go to fair Lawrence and see what he thinks she should do if that fails. Then she can/might kill herself.