Sorry to hear your frustration. I am a 40 year old male who was diagnosed with Pancreatic Cancer Stage 2. Although Pancreatic Cancer is normally in older people I had it. I went to the emergency several times, did the scopes upper and lower and blood test, ct scans, etc,etc. After having the gall badder removed and still having issues went to the ER again. Finally they did an MRI, that is when they found a mass on my pancreas. From there I went to UIC. Do yourself a favor, look into going to UIC . The teaching hospitals have the equipment needed to do scopes with needle biopsies that can identify what you may or may not have. I was lucky, I had the whipple procedure eight weeks ago and all pathology came back clear- no cancer. Other than frustration with my drain I am trying to get better.
It is so frustrating when you have something wrong and can't get it identified. Don't listen to Doctors speculations. Get an MRI and then you will be able to find out what the issue is. Most of my tests, and blood tests came back within normal ranges.
Good luck, and I hope this helps