Question: left sided pain and nausea

I am asking this because I am almost three months post gallbladder surgery and still have digestive issues. I had my gallbladder out on aug.5th after a HIDA scan showed a low ejection fraction of 29...it was determined I had no stones after an abdominal ultrasound, an abdominal CT scan, a small bowel study, an endoscopy, an MRI of the thoracic spine, a colonoscopy, x-rays of the ribs, neck and shoulder on left, complete blood work both before and after surgery---the endoscope showed some inflammation (thus gastritisI guess) but every thing else was normal...I take protonix (20mg) once a day, Carafate (2xday), digestive plant enzymes (with lunch and dinner),probiotics and xanax to sleep at nigh (.25mg.)--I also have pain in my left upper abdomen under ribs sometimes but it isn't bad pain (it was bad before my surgery sometimes)and I have had pain under my left shoulder blade too.....however I have had these pains on and off for 5 years but with no gastric symptoms...My presenting symptom with the gallbladder was constant nausea---and the nausea still happens on many day, especially in the morning with some reflux in my throat....My doctor doesn't seem to think I have pancreatitis because he feels it would have shown up in my tests but what could this be? What do you think---my gastro doctor thinks something would have shown up if it was pancreatitis---i am scared, queasy sometimes and don't know what else it could be---could gastritis and bile reflux be causing the nausea? Can someone have pancreatitis for 5 years without a diagnosis? Three years ago when i had bad pain, my internist did blood work and a Ct of the abdomen and nothing showed then either---although I never had gastro symptoms(nausea and diahrrea until right before the gallbladder surgery) With the testing i have had, would they have found pancreatitis or pancreatic cancer?