Pretty much my first time growing and I think something is going wrong...SOMEONE HELP

I think my plant is in about the 7th week of flowering and it has been doing real good. But I just checked on it and pretty much the whole plant seems to still be looking and doing good, but there is one bud on a middle branch that isn't looking good at all. I will post a couple pictures. First pic is of the top of the plant and the other two are of the bad branch.
This plant isn't from a seed, its a clone from someone elses plant.
I need to know if I should cut this one bad branch off or cut my losses and harvest now and I hope it gets me somewhat high. Looking at the trichomes none of them are turning amber yet and I can't really tell if they are clear or milky. Some of the white hairs are turning orangeish red.
Does this problem look like something any of you have encountered before? Does anyone have any info or advise that they could share with me? If nobody responds to this post soon, I will probably chop the one branch and see what happens. And if more of the plant starts to get like this one branch, I will probably cut the whole plant and harvest early.

Could the problem be under or over watering? Whatever that one rot thing is? Or maybe the light burnt it? I don't recall if that branch was facing more towards the light. I turned my plant to change the light angle on the plant like I usually do one a day or every other day. And noticed how bad the one branch looked after I turned the plant.

PLEASE SOMEONE HELP ME........ PLEASE
Thank you so much and good luck to everyone else.

possibly from lack of fan leaves. have you removed any in that particular area? and also, do you have a white fly problem?

Some of the fan leave have yellowed. They haven't fell off, but they are kinda drooping like they might just fall off. Would you suggest cutting the one dying looking branch or harvesting the whole plant early?