Is there anything to do without harvesting?

I'm not an expert by any means but I would guess another couple weeks at least. If you've got flower nutes, I'd give em another couple rounds of that this week and see if it helps. With using used soil there probably wasn't much nutrients left in there which stunts growth. I'd just baby her as much as you can without overdoing it. How are the trichomes looking? If they aren't mostly cloudy with some amber I'd keep feeding her. I had one do this and I just keep feeding her. I'll stop with the feed when her trichs are all cloudy then I'll flush for harvest. Mine has done better at filling out the buds since I upped the nute game a little.