Congrats to your new addition. Usually puppies should stay with their mom at least until 8 weeks. Anyway...

Gigi cried at night too when she first came home. It's normal, cuz they are not used to the new environment. I have her crate in my room and whenever she started whimpering or making noise I will put my hand in her through the bars and that seems to calm her down. It took me about a week to sort of stop the crying at night, but she will start crying in the morning the second she heard that I am awake. I put her crate in the living room after a week. Or if you allow her to sleep with you, I am sure the crying will stop.

Then there is me having to go to work and leaving her at home. That's a whole different story.

There are plenty of help books out there. I have Dachshunds for Dummies. Here is one for Pugs.

Hope it helps.