I've always had a major issue with belching, and sometimes when I have a large build up of gas in
my stomach, I will feel extremely nauseous, discomfort in
(spasms of the esophageal sphincter), heightened anxiety, heart palpitations, difficulty with breathing rhythm, sweating, and overall really crappy. I try to belch, but can't, only to take in more air. When my esophageal sphincter finally relaxes, I will let out a massive belch, and all symptoms disappear instantly.