I agree with others about getting a 2nd opinion.

My mother died of pancreatic cancer, so I worry about. I had genetic testing (for breast cancer) and there was no indication of higher risk of pancreatic cancer, but that does not mean I do not worry.

I have lost weight recently and of course I was concern. It turned out to be a new medication I was taking that decreased my appetite, but I did have some upper GI tests. Found a small ulcer and a biopsy discovered I had Small Intestinal Bacterial Overgrowth (SIBO) which does cause belching.

Here is more info about SIBO:
https://www.mayoclinic.org/diseases-conditions/small-intestinal-bacterial-overgrowth/symptoms-causes/syc-20370168
Treatment was antibiotics regiment over 6 month period. A week on, 3 weeks off, repeat with another antibiotic, etc...

I have also had abdominal MRI and did show small cysts on both pancreas and liver. Had a discussion about cysts with my breast cancer oncologist and she assured me due to small size it was not a concern and not an early indication of cancer. Will continue to monitor.

I hope you get some answers soon.

Laurie