Laboured breathing for severa minutes after she made a nest out the blanket on my chair. Is she ok

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this is the second time she has done this in my apartment. she makes a nest then stabilizes herself with her wings and starts to pant and loose color in her face and comb . i first thought its just her trying to lay an egg . The first time she has done it she hasnt laid one and now there is nothing either. Now im wondering if its something else ?