Brenda,
It happened to my 2 Pastilieres when I decided to up pot them, leaves are all gone but, looks like the buds are waking up again, here in Los Angeles, dormancy comes very late if it ever does...
In your case, the tree is going to dormancy, don't worry :)
Minimize the watering and treat it like all others in your zone would with watering amount and winterizing it.