Hey there alienscrogg, I would veg another week, why? The yellowing between the veins and tips on the edges of the leafs is a magnesium deficiency , you should totally get some in there before the flip, once you add the problem should stop spreading fairly quickly and the plant will recover in like 10 days or less , the point is you really want to be 💯 on micronutrients before the flower stretch . Hope this helps ! 🚀