Please check this baby for liver shunt. Does she act funny after she eats (can be sign of liver shunt)?
Also, when she was 'screaming'....were you able to tell where the pain was coming from? Was she holding her neck funny?
If yes, please get this baby checked ASAP for AAI:
Atlantoaxial Instability (Luxation)
If she does not seem to show sensitivity to sugar levels (hypoglycemia, which is common in yorkie pups), then the other 2 things above would be very important to explore.