I Have Had A Burning Below My Ribs On The

I have had a burning below my ribs on the left side for 2-3 years. I have also gained 20-30 lbs. It is mild most of the time, and more intense at 2 a.m. and other times I've been without food for 4-5 hours. I occassionally have funny pain in my chest that feels like my diaphragm is tight. I can't lay down to sleep, or it feels like chest pain. I take one omeprazole at night, and sometimes tums. (I had surgery for hiatal hernia 3 years ago. I've had blood tests, CTs, MRIs and cardiac stress test to rule out most stuff! The tests are all normal except H. pylori and inflamation on blood tests and inflammation across abdomen.