She may be having some reproductive issues if she stopped laying a while back. Do you notice if she has any swelling or fluid in the abdomen?
It might be a good idea to have the vet re-check to see if the worms are gone and see if she's got an overload of Coccidiosis.
I'm sorry your pullet is not well.
Can you post some photos of her, her poop and the inside of her beak?
Was it food stuck inside the beak or could it have possibly been canker, lesions or brown/yellow plagues?
Is her crop empty first thing in the morning before she eats/drinks?
What type of...