still lily white pistils with minimal plump in calyxes.. i woudln't even think about it... it's got a long ways unless its development kicks it into high gear compared to previously.
when it actually looks like buds, it still needs another 7-14 days.. variance exists, of course.
get a 30-60x loupe... becareful they lie their fucking assess off on the magnification of the cheap stuff, of course.. cause why would anyone have any fucking integrity, ever. check comments... find one that is a glass lens and not plastic. you really do need 30x or more, or it's too small to see properly.
pistil coloration...
bud density..
all three are great physical characteristics to use.. start paying attention.. watch how each develops... in future, picking out harvest date will not be a concern nor create anxiety... unfortunately, you just have to go through it a few times to build that experience up.