What Causes Persistent Nausea And Pain Below The Ribs?

Sorry it s so long! I am 27 yo female, 5 8, 135lbs. I have been dealing with nausea and pain between my rib cage near my LES on a daily basis for about 2 years. I gag daily, however, am rarely able to throw anything up. My original dr told me it was reflux and sent me home with prevacid, which did nothing. My symptoms are not consistent with food intake. I am an SLP and performed an informal barium swallow test on myself to see if I could see any reflux. My stomach appeared to be sagging near my hip bones and radiologist suggested a CT or ultrasound to rule out any tumors, etc. Ultrasound found gallstones, which my GI dr immediately assumed was the problem. My symptoms were not consistent with gallstones so I asked to have a few more tests run to rule out any other disorder. EGD came back positive for H.Pylori which was treated with no relief. Otherwise no remarkable findings. I reluctantly had my gallbladder removed May 28, 2010. I had no nausea for 2 weeks, but it has since returned. GI dr yesterday wanted to have another EGD and if nothing was found, said he would just treat symptoms. I find this unnecessary as nothing has changed since my last EGD in March. Drs wants to label me with the most common disorders they see. It s obviously something that may require a little critical thinking. I have frequent headaches, fatigue and hypothyroidism. PLEASE HELP!