Flushing

Usually a 2 week is best. But any time you can to work the nutrition out of the plant provides for better quality finished flower. Hard to say exactly how much time you have left without pictures. Sounds like a week tops left though. Enjoy. 🌱

If you've already got some amber showing, I would do a two or three day flush - just pour enough pH'd plain water through the pots so you get a good runoff each day and then harvest... what you want to avoid here is overripening your plant because the THC will start to degrade and you'll be very unhappy with the product. Good luck!

No pictures of the plants so hard to answer

Flashing is always a good idea did u check the sugar leaves or buds that have little amber? Sugar leaves turn amber early than the buds I think you have time for flash