I am experiencing the same thing. I went to the doctor for the pain in my left rib cage. They told me I had gallstones and removed my gallbladder. A few weeks after they removed it, I started having acid reflux and went to the gp and they said I also had swollen lymph nodes, fever and put me on antibiotics. I also scheduled to see my GI. He did endoscopy and colonoscopy and found that I have Barrett's Esophoagus and precancerous polyps. I still have this horrible pain in my left rib cage and I just don't see how the two are related. The pain also spreads to my left hip. if you find anything out, let me know.