You should take her to a vet she probably has a bad eye infection and its starting to swell to where you can't see it and makes her eyes swell shut
My Dog Has Been Limping,eating Little,shaking, Favoring Left Leg. And Panting Hard. No Signs Of Pain. What's Wrong?
Your dog is in shock that means something happened to her when she wasn't expecting it if you let her outside and leave her she probably got hit by a car or something happened take her to a vet she needs checked out!