Yes, i have had this and actually went to ER thinking it was a heart attack or something very serious. The chest and stomach pain was unreal. I saw a cardiologist and he told me it was trapped gas, I initially thought he was nuts. A few months later the exact same problem happened, I let out a massive burp and it instantly went away. So, I have found that ENO works, not sure if you have that where you are. I drink a small glass and I burp pretty quickly many times. If I don't use ENO, then what I do is drink a cup of peppermint tea and walk. I drink the tea and walk until the trapped gas moves and I start feeling relief. It has taken up to 2 hours of walking to relieve it in the past, sometimes it takes shorter time. Hope this helps. I get the peppermint tea from regular grocery store. I find peppermint tea very relaxing and helps on days when anxiety is high.
Any other questions, let me know. I have had this for while.
Best of luck.