Should I be more worried about harvesting too earl...

It depends if it says since switching to 12/12, or since the first flowers appearing. Your girls seem to have started flowering two weeks on after the 12/12 switch so they might be around week 8-9. Looking at the trichomes, I didn't see amber, and there are still some clear. Pistils are brown and looking amazing. Waiting another week wouldn't hurt in my opinion, at least until seeing more amber trichs (unless you don't want that effect obv) Very good grow by the way!