upper GI endoscopy
may be done
Yes, I agree that a part of your daughter's disease is somatic. However, there must be a physical issue as well. This I say because she is throwing up lots of red blood and it is worsening.
I see that much testing has been done. Has a upper Gastrointestinal endoscopy been done? If not, you must get this done for your daughter.
Due to constant binging and purging, she must have caused a tear in the oesophagus or stomach. There can be ulcers in the stomach and oesophagus. It could be chronic gastritis
or gastroesophageal reflux disease
(GERD). Another possibility is oesophageal varices
An upper GI endoscopy can rule out all of these conditions.
You must ensure that she does not consume alcohol and cigarettes, if she does (sorry, if I have offended). She must consume bland diet and avoid all the spicy and high fatty food.
Give her cold
milk and yoghurt that can soothen the stomach. Also, give her over the counter available antacid
like Capsule omeprazole
20mg daily on empty stomach for a minimum of 6 weeks.
It would be ideal to consult a surgical gastroenterologist for the same.
This is the outline of what I think is happening in your daughter. I would be pleased to discuss further on this.