Congrats and happy belated birthday! Sounds like it all turned out ok.
There is one thing that I didn't realize about mice before I did some research.....Evidently they need to be in a very quiet environment. I read that when a mother mouse is cleaning her young she listens to whether or not they squeak. If she can not hear them squeaking (if they are in a loud room) they sometimes will assume that the baby is dead and will eat it. I thought that would be a nice tidbit of info to know.