I remember my first months with my now 8yo "pup". My clearest memory was the hour with an animal psychiatrist while I sobbed the entire session.
Things get better---I just needed to have someone tell me that. Max is my dearest friend today. I can't imagine what I would do without him. BYW, Max is the dog.
I am reading "Dogs Never Lie About Love" by Jeffery Masson. One of his three dogs is a female german shepard. You might enjoy it.The best of luck to you---my old peditrician used to order "tincture of time."