I second what Wyorp Rock said.
She doesn't seem to be showing anything that would indicate illness based on what I can see in the pictures, so it likely is food or debris. Best of luck!
Pictures might be helpful in this situation, if you're able to get some.
Is she showing any respiratory signs other than the breathing and the plugged nostril? Does it seem like she has gotten something stuck, or does it seem like it could be an illness of some kind?