Good to hear that she is doing a bit better, keep on it and stick with a good routine, She'll get it soon.
One other thing that I would suggest you doing is limiting her water to a small portion and not leaving food down for her during the day while you are gone. Make feeding her part of your routine when you get home from work. Out to potty / than food.
If you take her out first thing in the am when you get up (make sure she goes) than feed her and back out right before you leave, she should be ok. She should have enough substance to get her through the day until you return for her next feeding.
Lol, I always refer to mind as "The four Porky Yorkies".....
who are 19, 16, 15 and 10lbs.