Without bouncing around a bunch of different threads - noticed Blurple pic. So most likely that “ 1000 watt “ light is more like a 100 watt.
Which would explain some of the issue with slow growth. Regardless of what week it is in , it seems your grow setup for it is not optimal.
Best you can do , is run this plant as long as necessary to finish. Or at worst , improve lighting .
You could also run it under 12/12 ( regardless if it’s an auto ) and try to force finish it. It’s blooming anyways.