Hi TS. I'm a junior house officer. It sounds like a panic attack/anxiety disorder to me. The burning sensation and burping on the other hand might be due to GERD (Gastroesophageal reflux disease) or so called acid reflux. Anxiety might worsen your GERD symptoms which i think is what you are facing with. HOWEVER, i couldn't diagnose you without seeing you in person and please seek for medical attention to rule out other conditions like heart problems, thyroid, or electrolyte imbalances. The drs will likely do an ECG, a few tests and ask you a few more questions. Stay safe and stay healthy!