Nitrogen Deficiency?

Stay the course. Flushing will only make things worse at this point. Just keep getting plenty of run off and use that 500ppm solution of mostly bloom nutrients. It'd be good to slow this down and having a little extra Potassium in the mix should be helping. Maybe increase the Big Bloom another few ml to aid this.

Will do, she looks better today, the yellowing hasn't spread any and she looks fatter. Fingers crossed

Did some more trimming and I could really smell that spicy smell again.. turns out it was the yellowing leaves, weird. Noticed one of the fan leafs on one of the higher colas is turning yellowish from the middle out, also weird. I'm worried now that it has reached one of the upper shoots, it is the only one so far. She is getting a good watering of molasses tomorrow, anything else I should add that I can pick up locally?