I've been having this chest discomfort that's mostly in the center, but sometimes it's a bit on the left side too. Plus, there's this back pain right in the middle of my back. Last year I talked to a gastroenterologist and had an endoscopy and a chest X-ray. They didn't spot anything except a gastric problem. But here I am, a year later, feeling the same kind of discomfort again. What could be going on? Should I be worried, or is this something common that happens with gastric issues?