the hell?
crazy. never seen that happen.. have any pictures of this "16 week" plant?
also, if your still giving her high doses of Nitrogen?? Try stopping Nitrogen all together... don't give it any.
Find some nutes that are something like this: 0-15-0 <--- No Nitrogen, 15% Phosphorous and 0% Phosphate
If your still giving her high doses of Nitrogen.. this could be the cause of everything.
So again, try not giving her any nitrogen.. as this promotes new veg. growth... which you don't want during flowering/budding. You want to focus on making the plant bud.. and making the buds/flowers big and healthy and beautiful.
anyhow, good luck.
peace.