I ve had gastric symptoms for almost three years off and on. Just had 6 different tests with stool samples, all came back negative. Had a hiatal hernia back in 2006, but three years ago I also had five different gastric tests - endoscopy, colonoscopy, swallowing, stomach emptying test... yet today I still have esophageal spasms, gastric issues.... pain in my left side/ribs... I am a mystery.