ve lost a friend and companion, whether that friend is human or
dog. You will feel very very
sad. And go over all the things you think you did wrong, or think you should have done, etc.
But let yourself grieve. It's natural. You're right, to take a few days to let out the pain and grief, and be on your own, or do whatever you need to do. Maybe you could make his grave beautiful with crystals or flowers, or carve a headstone for him...