I am so saddened to learn of your beloved companion pupper departing for the Rainbow Bridge.
Nothing else hurts as much as what you are going through right now.
I am glad you asked for her body to be returned, given your feelings.
Your sweet pupper likely doesn't mind that you sent her discarded body to be cremated. She was finished with it, after all, & you chose to have her ashes returned.
I asked the same question of the vet when our beloved rescue kitty passed over, as to why so long for ashes to be returned. I was told the bodies are kept in freezers until they have enough to fire up the furnace.
It felt awful to me to leave her at the vet's office after she passed, but grandson was adamant that he wanted her ashes in case we ever move.
Healing vibes are on the way to you. Sit, close your eyes, and think of her & you might well feel her with you. 
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