Mike I am sending sending hugs and prayers to you, your wife to Jack and to his big bro Eddie.
What separates the good Yorkie owners from the GREAT Yorkie owners is the willingness to be open minded and to educate yourself about "all things Yorkie". Sounds like you are in the "GREAT Yorkie owner" category. We don't always make the right decisions, but we do make the best decisions with the information available.
If hindsight was foresight then we would never make mistakes.