Puppy not sleeping through the night

My 6 month old shih tzu has stopped sleeping through the night. She wakes up every few hours and barks instead of going back to sleep. I have close condo neighbors so took her out of the crate when she barked. Now I’ve created a nightmare and am up throughout the night. What can I do? I might sleep in the living room and let her bark a few nights. Ant advice? Thanks!