If the vet's office isn't staffed 24/7, I'd pick her up tonight and take her home. As long as you have the ability to keep the pup quiet and confined, there's no reason to leave her overnight at an unattended vet. Assuming you have an emergency vet clinic available to you, that would enable you to get the pup to a vet in the middle of the night if necessary. If the staff goes home at 8 pm and comes in at 6 am... how is that better "care" than you could provide?
Generally speaking the pup is super groggy. She may refuse to lie down, which means that until she does, you have to sit beside her and be ready to catch her, because she will be falling asleep on her feet and swaying, but refusing to lie down. Eventually she will tilt and you catch her and ease her the rest of the way to the floor and let her rest until bed.
The vet will caution you against it, but that's a formality. Now if the place is fully staffed 24/7, you may feel more comfortable leaving the pup.