New stomach pain and pain on left side sometimes after eating,too much ppi?

A brief background, I was having stomach pain mostly on the left side for over 2 years, prescribed nexium 40mg and was told gastritis, I've been having flare ups every few months. Any way had a colonoscopy and gastrophy this January, advanced pre cancer cells found in a large polyp, this was removed and back in 6 months. My gastrophy report was stomach and duodenum were normal but had scarring on my esophagus due to chronic reflux. Told take 80mg of nexium daily. Had a procedure 5 days ago dilatation to widen same due to the scarring and food getting stuck. My problem now is I'm getting awful acid type pain in the middle and upper part of my abdomen, especially in the last 3 weeks. Pain comes and goes and I'm now getting cramping pain and bloating after eating. Did have abdominal and pelvic ultrasound 2 years ago when all this started and all clear. I don't know if it's the 80mg that's too strong. Gaviscon or pepcid does help. I'm afraid now maybe it's my pancreas. I'm 52f, ex smoker for past 10 years, no health issues apart from high cholesterol, no meds either. My health anxiety is kicking in!!!