The first thing she did was go back to sleep, of course. When she awoke to a world illuminated in greyscale, her groggy morning barely-sentient mind flooded with all sorts of explanations. Perhaps it was still night. Perhaps it was one of those little waking quirks, like how you might awaken with a swollen eye or a sore back. Perhaps it was just a strange dream, one of those where everything was the same as reality except for one little detail.
It didn't really matter which one of those was right - all that mattered was that one action solved all of them, and that was rolling over, burying her face in the pillow, and going back to sleep.