['My dog had been missing for two days.  Then she suddenly was at the front door when I got home!  I thought she was gone for good.', 'That is a miracle.', 'I know!  I could not believe it.  I was so happy.']
I hope you make sure the dog is on a leash from now on.
My dog was missing for two days.  When I came home from work, she was standing at the front door!  I thought I had lost her for good.