I've found that whenever a cavalier has had to stay overnight at a vets or a hospital that they quickly work their magic on the staff and are hardly ever left alone. Misty should be a happy girl for the rest of the day and she's got her fuzzy throw to sleep with tonight.
I'll be thinking of you and anxiously awaiting (with the rest of CavalierTalk) her results tomorrow. Good luck. Hope you get some sleep tonight.