Hi welcome to health care magic... You are having acid reflux since long time .. You are using medicine and proper diet regularly as mentioned in history... By acid reflux esophagitis can be there and it can lead to esophageal spasm and somewhat difficulty in swallowing... Here hiatus hernia has to be ruled out.... Chest x ray and barium swallow examination useful.... If needed endoscopy done... To minimize reflux elevate head while sleeping. Avoid large heavy meal... Avoid food which aggravate condition like coffe , chocolate , pastries etc... Don t go to sleep immediately after meal... With keeping this in mind consult gastroentetologist. Take care.