Hopefully, them not having time means he isn't bad enough where they need to do something NOW.
Is he peeing more today? Is he on pain medicine?
I've seen them do that needle thing. In fact, Livvy had it done and it didn't bother her at all. It sounds much worse than it is.
I'm so sorry you're without him another night. Soon, this will all be over and he'll be home under the covers with you.
Take care, we're here if you need to chat. :)