Unless those white pistils are foxtails I'd say you have way more than a week left.Update I'm thinking maybe another week but idk what do y'all think? Already started flush maybe plain water for about 3 feedings
When all white pistils turn red and crinkle in you know they are finished flowering.
At the same time she will gradually stop eating.
If she is draining her pot regularly she is still flowering and building for you.
I feed to the end, flushing water through just starves them.
Great work my friend, be patient.
Stay safe
Bill284