I am really sorry for your loss. My family and I have learned very quickly how easily and quickly one can get attached to the lovely little creatures. You did all you could and I am sure made her final days as comfortable as they could be.
Sorry for your loss. A quick note for the future. Don't give birds milk. They can't digest the lactose since they don't produce the enzyme lactase. Milk consumption is a mammalian trait, and most can't even consume it outside of infancy (they stop producing lactase at weaning).