She still has a little while to go.
My guess would be around 2 weeks.
The time they put on the pack is a guideline and not gospel.
I've notice most take a week or 2 longer than what they say, especially outdoor or sun grown.
If your flower is not fox tailing (doesn't look like yours is) , then wait for 90 to 95% of the pistils to die and brown.
If it is fox tailing, then ignore the new growth and go off the majority of the flower.
Checking trichomes IMO is a waste of time, it confuses most people more than it helps.