Burping and a gulping sensation tonight. Tried multiple pillows. Antacids and Mylanta. Dozed off and suddenly sensation my air stopped in throat. Sat up and hard belch produced severe burning in throat and chest. Terrible taste. After hour, throat se

Bad GERD. Sounds like you have acid from the stomach coming right up into your mouth - GastroEsophageal Reflux Disease - GERD. This produces symptoms as you describe. Treatment is simple - an over the counter PPI such as omeprazole will work wonders. Real question is why this is occurring - should see doc to straighten this out.