That's good to hear. Very often, something will get caught in the larynx and it resolves overnight like that. Your situation seems to have followed that pattern.
Yes. Your first task in the morning is to check her crop before she has access to food and water. You want to check the status of her crop to make sure it's completely empty and flat against her chest.
The most common cause of wheezing in a chicken is a crop disorder. The second is a...