That things ready to collapse bro. Yikes.
Leafs will turn yellow in late flower, if you're 2 weeks from chop as you say, stop feeding and just let them do their thing. Flush of you're into that sort of thing. Bur the color change is likely just a lack of N, and the plant feeding on itself.
Weed leaves change in the fall though, like any plant. Just get that thing some support.