I have had the endoscopy (March 20) - she said there was inflammation and when I read the report it said I had moderate amounts of eosinophils- so I'm going to check back with her today. I think this allergy diagnosis is new enough and maybe even some doctors don't recognize it fully yet. She just thinks it's reflux. But there has to be some reason that the proton pumps don't cure it completely.
The only way to get a diagnosis of EE is via upper endoscopy (EGD) with biopsy of the esophagus. You may want to discuss having an EGD done with your GI person.