About the poo issue (assuming she doesn't have a medical issue - they can be hard to find sometimes)... this might be the problem at night. If my pup has diarrhea, he gets me up frequently in the night... he just cant hold it (could you?)
When this happens (many GSDs have sensitive stomachs) I give him some pure canned pumpkin (no spices) in his food, and if it's really bad and I'm desperate, I'll break a pepto pill into halves or thirds and give him a bit. Within a couple hours, the diarrhea stops.
Warden - Sable GSD 4/23/2013
Blackjack - Black and tan GSD 4/23/11-6/1/2012