I didn't want to tell you what to look for before you did it because sometimes the mind can play tricks. I was looking to see if ascites was causing the respiratory issues. Her bottom would feel like a water balloon.
She needs antibiotics and soon. Then, she needs testing to see what she has. I use RAL in texas.
https://www.vetdna.com/test-type/avian-bird. I would test for mg first, and if negative move on to other respiratory diseases. I don't think she has infectious coryza - even though you and I are susceptible to it based on where we live. Her face is not swollen. I don't mean to alarm you but if she does not get help soon, she may pass. If you get a broad spectrum antibiotic on board, you can buy some time to get answers.