Nothing to worry about! She's well on her way!
More white hairs = more buddage! Keep her going until you see them receeding and going orangey brown and she'll be ready.
You can look at the trichs and hope to see a mix of cloudy and amber ... if they're all clear, it won't be ready to harvest yet!
You can't trust some breeder timescales .. lots of factors including setup and environment can make a difference, but sometimes, they're just plain wrong (possibly due to phenotypes).
Sweet seeds time predictions are usually pretty spot on .. i often finish em earlier, but i pick em when i'm happy ... rather than letting them go to deaths door!
Good luck with the last couple of weeks!