At three weeks I’d be surprised that you even see any milky tricomes.
You’re only at week three my friend. Unless you have some godly genetics that finishes in three weeks. Which I doubt.
No you still have about 4-5 weeks to go before that’s even ripe. Just based on your diary timeline it’s not ready. No you’re also not ready to flush yet.
Keep growing it out. It’s looking good. 🤙