Constant Air Buildup in Chest/Throat

Has anyone one else ever experienced a sensation of like constant air buildup in their chest/throat ? That’s the best way I can describe it. Me, my mom, and my uncle (mom’s brother) all experience this, but doctors have no idea what it could be. It’s the feeling of like really having to burp, and that does bring relief but then it builds right back up and often feels trapped. The only thing we’ve found to help is chugging carbonated water. It usually lasts several hours and is painful. My moms is more severe than mine, and early on she even thought she was having a heart attack because the pain was so severe. She was checked by a cardiologist and nothing was wrong. Just wondering if anyone else has experienced this because it’s so frustrating when doctors can’t help you.