My plant is currently about 8 weeks into flower and I decided to flush a few days ago before I chop her down in a week or two. All of the leaves were still nice and green looking before the flush. After the day I flushed her, the very next day many of the fan leaves started getting lighter and now a few days later they are looking rather yellow. All except for around the bud sites where they are still nice and green. Is this normal?