Clicio, when you say it will take a miracle for the tree to survive are you talking about crent89 or my tree?
I am talking about your tree.
Yes, trees drop leaves when stressed. Some recover, some don't.
But when a tree loses its leaves because it is in desperate need of light, and underwatered/overwatered, it is very, very difficult to save it.
I sincerely hope it does recover. But if it happens, consider it...
A miracle.