Yes. She is a rescue.The first time we dropped her off at the big box pet store for a trim, it was very clear that she thought she was being returned as damaged goods. She almost lost her mind when we picked her up again. She is getting better. It only takes time. Lots of getting left on her own and having us return very nonchalantly has made our absences a fact of her life and easier for her to accept.
It is a mistake to greet your dog excitedly upon your return. Only greet your dog when it is calm and wiling to lie down to show you its belly. Until then, don't let your dog jump up on you or guests. Tell your dog firmly "no" then issue the command "roll over." That way, when you are getting your dog's belly later, you are rewarding the calm feelings instead of its excitement and angst over your being away. Eventually your dog will learn to feel calm in your absence in order to be rewarded and get its belly rubbed that much faster.