Does she have free access to food and water? It doesn't hurt them if you restrict their intake of fluids after a certain time at night (a couple of hours of so before you go to bed) and will keep them from getting you up all night. She is young yet and doesn't have the bladder control she'll develop later on - but you know that!
I started Wallis out in a crate but Bubba didn't think it was fair for my other shihtzu to sleep with us and not her, so that was blown in no time. I think I've mentioned before that I went out of town once and he decided that the dogs didn't need to be crated at all when we were gone - which I don't agree with but Stewie 2 would scream her head off now if she was confined.
Good luck, and hope you catch those much needed zzzzzzzz's soon.
RIP Wallis, John Robert, Tibby & Pip
Mom to JoJo, Roxie & Linguini (Cavaliers)
and my birds Moji (Senegal) and Walter (Blue Front Amazon)