Well it's a marijuana grow site and you seem to be handling that just fine. The rest will come. Stay around to advise other new growers to not use fertilizer so damned much.
You could do anything you want but IMO it would be wasting the bud taking it at 4 weeks. Don't rob yourself man, be patient, enjoy them when they're ripe.
You don't pull apples off the tree when they're half ripe.