I get the same thng it mght GERD but it could b other thngs to
Welcome to the forum!
This could be due to esophageal reflux (GERD), where the food in your stomach is thrown up into your food pipe or esophagus. Another possibility is hiatal hernia, where a portion of stomach herniates into the chest cavity through the diaphragm.
Tumors or inflammation of larynx too can cause similar problems. However you have been to ENT specialists. Please consult a gastroenterologist now and see.
Hope this helps. Please let me know if there is any thing else and do keep me posted. Take care!