Okay, so it really was not a nightmare. We finally got in to see the Pediatric Orthopod today. Sunday night, when they were splinting K, I asked if it was a radius fracture. The tech said, "No, she fractured her ulna." which did not make sense to me but, so be it, she and the ER doc (who I only saw on the way in) are the professionals.
She did fracture her radius and not her ulna. Her fracture is diagonal and right into the growth plate, which, in a weird way, is a good thing. Because it is near the growth plate, it is likely to heal faster. But needs to be watched closely.
I paid the extra $40 for K to have a waterproof cast, since swim team starts soon and I at least want her to go to practice. Plus, my back cannot take the stress of giving her a bath, I will have to help her, but at least I don't have to hold her arm up while she rinses her hair, etc.
Her cast is pink. Above is a picture with her identifying features blocked. We have an appointment for a recheck next Thursday.