GERD is certainly possible, but other more concerning diseases can be considered as well.
I agree with the CT scan, which can evaluate the liver and gallbladder. It can also image the pancreas - but if pancreatic cancer is a concern, an MRI can be considered.
I would also evaluate the upper digestive tract. The most comprehensive test would be an upper endoscopy. With the history of weight loss, I would suggest this test.
Non-GI causes of the sore throat can be evaluated by an ENT physician.
These options can be discussed with your personal physician.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
kevinmd_