I have exactly the same symptoms and a history of pancreatic cancer in my family. Not sure how to try to escalate this further or if that seems ridiculous. What did you do to get further exams?
My GP had x-rayed me, looking for a cardiac anomaly - he suspected an aortic aneurism. What he should've done is order some soft tissue radiology instead. Having your GP consider a CT or MRI is my advice.
Hope in your case it's all for naught. Best to check though.
I really hope you are better.