Progression!

Hey All,
 
Finally Bambi has made some progress...peeing on pee pads now and then...kind of getting her name...somewhat learning to stay...all looks well for now the only one problem I'm having that's bothering me is the sleeping thing...she doesn't sleep at night unless I'm there...and in the day if I leave for like 5minutes she cries like crazy! How do I get her to stop, I wanna teach her before September because I have to start waking up earlier come that time. We keep her in a little 3 by 3 area that we fenced off and take her out for 90% of the day...can we get her used to sleeping in their at night by letting her cry it out in the day? because we can't let her cry at night because she's waking everyone up? Please fellow puppy owners, what should I do???
 
Thanks