Leash, it sounds like you're just exhausted and overloaded and need a break! Something has to give here I'm afraid so you might need to look at how you can take some pressure off yourself. It must be so hard to be patient after a day working at childcare. And 9.30 is really late - maybe Jazzy is ready to drop her daytime sleep?
I know you are saying the only option is to make it work, but it sounds like right now it is just too much. You need to find a way to release some pressure.
Take care of yourself