It looks like u may be having either Acid/non-acid bile reflux.
Acid reflux- Two management options - longterm PPI or surgical correction.
Non- acid reflux - need further evaluation regarding the same.
Grade 2 Hills usually doesn't cause such significant symptoms.
Next Steps
24 hr pH and impedance study and Esophageal manometry
Health Tips
Consult a Surgical Gastroenterologist