I am worried that I have pancreatic cancer. I'm a 28 year old woman. My great aunt died from pancreatic cancer, but she was in her 50's 

A few months ago I started having digestive issues that include excessive gas and burping all of the time. I then developed pain on my left side under my ribs and in my back. It jumps around the rib cage and mid to upper back. I also feel it in my low back and abdomen occasionally. 

I've had a ton of blood work and stool tests that all came back clear. These included liver tests. They checked my gallbladder and found nothing. I had a CT scan of the abdomen and pelvis that also came back clear. I even had a second radiologist look it over to ensure that the first one didn't miss anything. I have a colonoscopy/endoscope scheduled for a few weeks from now. I'm just worried that the CT scan may have missed something on my pancreas, because of the pain location and the weird digestive stuff.

Any advice or personal experience would be so appreciated. I've definitely been anxious over the whole situation.