Hi and I am very sorry about your hen! I would hop over to the Emergencies/Diseases/Injuries and Cures forum:
https://www.backyardchickens.com/f/10/emergencies-diseases-injuries-and-cures
If this doesn't help you I would take her to a vet, have a wonderful time on here and best wishes!
This is the best advice I can offer as well. Hope you find a solution. to BYC and thanks for joining us!