I am in the same boat as you! My pup is 14 weeks and is so incredibly dependant it makes me nervous. I go back to work next week and I wonder how he's going to handle that! Luckily I can get him to sleep in his crate through the night. We sit on the couch for an hour before bedtime every night and have quiet time with the tv on a very low volume. I take his toys away 30 mins before bedtime and he usually passes out and I carry him into his crate repeating "It's bedtime for the baby." I've read that consistency is key. Also, try not to come running when she barks (I know it's very tough with neighbors). Did you ask her breeder what kind of nightly routine they had? I just kinda kept following the breeder's sleep schedule for him. Good luck!