Any chance you know if the few days shes doing ok and then droops off again, is she being watered? The heavy watering or even a muddy soil thats got poor drainage can give her that droop. Otherwise the opposite can be true as well, lacking in water but once watered the leaves perk up(if its underwater it should be quickly noticeable the leaves perking up). The last possibility i can think of would be root problems, rot etc, that can cause this intense wilting and will often wilt the stems as well, making them a bit weak and bendy.
I hope you can get her to the finish.
P.s regarding the yellowing leaves you mentioned this week, i had all of my plants putting out discolored leaves towards the end of flowering, i think partially senescence and that i started to lower any nutrients.
Happy harvesting ✌️