Oh I forgot to mention when I have been at a local pet store they have alot of treats, supplements. One is called Calming or Relax? Maybe look into a natural supplement before bedtime to see if that helps.
Also Boopster on here mentioned she was using Pheremones.. a plug in that helps them become less stressed. She was saying how stressful her nights were becoming as well..
Here is the link to her post:
http://www.yorkietalk.com/forums/yor...heremones.html