At the end of Nov. I started having a burning gnawing feeling in the middle of my stomach right below the breastbone and belching alot. I went to the dr and she did blood workup and a H pylori test which all came back normal and said I probably had too much acid in my stomach. Put me on prevacid, took that for 5 weeks and it did nothing. Went back to the dr where she did more workup, checked my pancreatic enzymes and liver functions which once again came back normal, had a ultrasound on the liver, pancreas and gallbladder and all came back fine. I went to a GI dr that went over all my test ask alot of questions and said nothing seems to be out of the ordinary. I am having a endoscopy on Monday. He told me to try prilosic which I have been taking since Friday. I do feel somewhat better, have my appetite back, the burning comes and goes now but now my upper stomach feels sore almost like if I have done 1000 situps. Also how long does it usually take for medicine to really work? When you read the prilosic it has on there 1 to 4 days, does that means that you start feeling better but it hasn't fully done its work? Any answers would be helpful. I also feels worse in the evening. Does this still sound like too much acid in the stomach? I am going crazy over this.