Aw poor baby. She sounds lovely.
When we first got my boy Collie, Jack, we had to keep him in the bathroom in our flat, and he cried almost as much as me on the first night! It was heartbreaking, but fortunately I had been told to ignore him. Much like a baby, they will begin to cry all the time for attention if they know you will come to them to comfort them.
A t shirt that smells like you (preferably an old dossing t shirt, and not your favourite and most expensive one!) in her bed might calm her, and the sound of some background music, as suggested, might calm her.
The nightlight is a good idea ganesh-I haven't heard that before.
It can feel so bad leaving your pup by herself, but it's worth one or two nights of guilt for a quiet and not-so-demanding dog for the next 12 years plus!
Good luck with your new baby, Lisa. x