Take closer pictures and post them. People cuts plants too early all the time. It will make your weed half as good and hurt yield and smell.
People always say to harvest by trichomes, but what they fail to mention is that you shouldn't even bother looking at them until the plants look finished. I don't know the correct terminology is but the lil bracts or whatever they are called under the pistils swell up and look and feel like they gonna bust. At this point it's time to start scoping if your going too.
Scoping too early can lead to premature harvest I've seen trichomes that are changing weeks before harvest, new ones kinda pile on as time goes by and then those cycle into changing colors.
I know autos are fast but I doubt it's that's fast, how many days does the company claim?
Harvesting late is way better then potentially weeks early ending up with some hay smelling herb that lacks potency. Rarely is anyone upset they took a plant too long.