Jason is right, dont worry about her growing balls. Too late to do anything about it anyway. Its hard to tell if she's ready. Rule of thumb, if you have to ask, its probably not. If you can get a strong magnifier and look at the tricomes to see if they've turned from clear to milky or amber. As soon as that happens its time to harvest. Usually that will be when about 75% of the hairs have turned dark.
Good answers here guys. Roll it up is the shit! I wish this site was around when I started growing back in the 90's.