Should i begin flush?

I would give it another week before starting a 10 day "nutrient witholding period", otherwise known as "the flush". No need to drown your plants, you just want the plant to "flush" all the nutrient salts out of its system, it is not an exercise in flooding the bejeezus out of everything! Start flushing when you have 90-95% brown pistils, this will put you in the zone for 10-30% amber trichomes come harvest time. If you are running a humidifier, I would be switching that off ASAP before you get a real fungal problem.