White hairs = still growing so don't cut down just yet. Letting them get fully ripe not only increases yield, but taste also. I would say 1-2 weeks sativas can sometimes go into 13-14 weeks before they are completely ripe.
It looks like the environment was way off, or the nutrients were in some form or another. It looks like its been done a while it just is a very weak and damaged plant. Harvest the bastard and plant some more!
I did a relatively great job with the environment for my first grow I must say. Ph level was never off temp stayed at74 degrees always constant airflow. And the buds are very dense so its not a weak plant. And its just bagseed from some medical I had I can't remember the strain but I do have oger seeds I plan on starting after this harvest