So I just wanted to update everyone on what's been happening with her. I kept an eye on her all weekend and noticed that she only pants when she's in my room. I have a mat in there that she loves sitting on and she's always panting when she's on it and her beak becomes very warm. In the living room, she's perfectly fine - steady breathing through her nose. So maybe you guys were right about the heat getting to her.
The only things that are still bothering me are the whistling sound that comes and goes, the occasional sneezing fits and her opening her mouth like she's gagging(?) and scratching the underneath of her beak when she does that. Could that be the respiratory infection Saaniya mentioned?
Remove the mat and let her stay in cooler place if she seems very warm
And where she gets plenty of oxygen like near window
It's important to give them fresh air especially when they are indoor pets
If she sneezing while eating or drinking i didn't look for worry
I will simply change her feed and try to clean the dust or dirt
Second I will add some 1 drop of oregano oil in 1 gallon water and give her for a day to cure any mild RESPIRATORY Issue
Third if she's acting fine eating pooping drinking I don't worry just change her place
Respiratory symptoms Exist then I do Antibiotic