to harvest now...or later?

so i posted this in another section a few days ago i currently have a sativa (some decent bagseed i had) that is been flowering for a while now not exact when but im sure at least 2 months but anyways its suposed to be pretty cold these next few nights..now ive looked at the trichs there mostly milky the main cola however has a few amber ones this is my first grow so i plan to learn from my mistakes...i kinda wana harvest tonight due to the temps and the fact that i dont have a stash left lol....here are some pics... suggestions please(sorry the pics are crappy)

i hate to say it bro, bu i would say a little bit longer. i no ino, it sux, but sativas can flower up to 13 weeks(latest ive seen fom my buddies setup.) i would 5-7 days to let it finish up