I Have Been Having Stomach Issues For A Number Of

I have been having stomach issues for a number of years as well as weight gain and loss without trying, nausea that comes and goes, periods of severe fatigue. I recently had an ultrasound of my abdomen and one of the findings was my gall blatter measured. The report says: Common bile duct measures on the order of 5 mm in diameter. I have read this seems quite large as I have been an athlete my entire life (college and a little professional) and am a fairly active 46 year old male. Could my issues be related to my gall blatter or possibly even pancreas problems?