Is she actually chewing her food, swallowing and regurgitating or is she not able to chew and swallow her hay at all??
One possibility that sprung to mind is 'hardware disease' eg a piece of baling twine,wire etc that is caught around her toungue and going down her throat or actually lodged in the reticulum and preventing cudding and normal flow of material.
Vet job I would say and sooner rather than later. Good luck