So sorry for your loss. We had a corgi that grew up with the kids, passed away in my arms.
I know you don't want to hear it, but my advice, get another dog as soon as possible.
We went and picked out a border collie, about the same time we ended up with a golden retriever. All within 3 months of losing the corgi. Best thing that ever happened. Couldn't bear to get another corgi so soon, but we love the new dogs... That was almost three years ago, and both dogs worship the ground that I walk on. Quite humbling actually.
You can never replace the one you lost, but you can have a different friendship with another. It sure takes the hurt away.
Take care
Dean