So sorry John. I recently lost my beloved Fluffy at the hands of misguided vets. Whether they did it on purpose or by accident, he went in walking, talking, eating and more and came out so weak he could not hold his head up. This was 4 days mind you. After the head of the clinic paniced seeing what happened he promised he could save Fluffy with 24 hour care but Fluffy went into a coma and died 12 days ago.
Nothing prepares you is right but like you I would not trade the time I had with Fluffy. He was my love, my best friend and my companion for such a short time.
Not sure how long you will take to recover but for me it has not gotten better yet.