Conservative measures are normally tried first before considering lysis surgery, and a
low-
residue diet would be an appropriate first measure if adhesions are suspected.
Otherwise, if you continue want to pursue a GI route, a 24-hr pH study and esophageal manometry would be the next, more specialized, tests to consider. GERD and an esophageal motility disorder would be excluded with these tests respectively.
These options can be discussed with your personal physician.