That looks like a pic on a sugar leaf
To be honest. If so, definitely start flushing if you haven’t already (if you practice flushing). You should be looking like 90% milky on your buds at least by this point. I’d say you can harvest anywhere from now to a week from now and you’ll be lore than happy. Don’t forget an extended dark period has been known to help develop richer profiles in the buds as well.
Happy growing.