I would say around 1 more week left before she drops. Right before my guppies drop, they will go in a corner of the tank, or swim up and down one side of the tank.
3 to 10 days imo. bullying fish seems like it could be her first drop and she's uncomfortable. other signs that have been posted are good ones. keep an eye she doesn't hang too close to the heater. they'll do that sometimes and they could burn themselves while seeking refuge. expect anywhere from 6 (very low) to about 30 (pretty high) babies for her first drop.