BudsRusanswered grow question 4 years ago I made a post similar to yours and what the best suggestion I got was incase you don't have a microscope...
If you have a really good phone or camera take a photo zoomed in and as clearly as you can and you can see the amber from the cloudy trichs if you see any amber even just 1 start your 2 week flush because average it takes 2 ish weeks from trichs to go from cloudy to amber.