Hi. Thanks for your query. Noted the history waking up with acid in mouth, burning sensation in stomach area, chest feels light and upper back hurts; given antacids but not helping. All these symptoms are suggestive that you may be suffering from severe acidity, esophagitis, GERD and may be an ulcer somewhere hence antacids alone are not working. I would advise you the following: PPI to be started Antacids every three hours Cold milk, water, ice creams No anxiety or stress as it increases the symptoms Motility regulator like Domperidone. Upper GI Endoscopy and motility studies to get a confirmed diagnosis and further management.