Am I over feeding ?

Tade on dark side. I don't see major clawing all over. Reduce concentration or give water-only for an extra irrigation etc.. I doubt you've impacted the flower in an negative way. It's only slightly overfed. Your diary says coco coir, so it's a soilless context? Since we provide everything in that context, a simply formula change and maybe 20% runoff would shift the nutrient content of the soil down very easily. Or, start mixing in a water-only irrigation every other irrigation etc... more than one way to skin this cat. We cannot dilute what is already in the plant, but we can reduce what goes into the plant above the rate at which it gets used, which will slowly draw down excess nutes in the plant over time. Depending on how much time you have left, you may need to fiddle with the formula a bit -- drop N and keep the rest as close to what you had before as possible. N is not the only nutrient that can cause overly lush foliage as it builds up in the plant. I spoke in some general terms to avoid writing a book, but each individual nute molecule needs to be considered as far as how much you provide and rate of use etc... Ratio is just as important as overall concentration of nutes. look back over pictures and such... find a point where it started to get darker, assess how you fed in the weeks even month leading up to that point and after. Adjust formula and eventually it'll never happen or rarely happen ever again. I still get 10-20% of my plants getting a bit too dark near end of flower. I've been slowly adjusting my formula and timing of reducing N 10-20% etc etc.. but couldn't make those adjustments if everything is in flux. Consistency allows for intelligent adjustments and repeatable results.