Your symptoms are characteristic for someone suffering from a acid reflux.
A burning sensation that radiates up from the stomach to the chest and throat, or heartburn is the main symptom.
Feeling fullness in the stomach, nausea after eating, chest sensations like food trapped behind the breast bone and chest pains that may radiate to the back, chronic sore throat with feeling of nodule in your throat, and constant need to clear your throat, are symptoms of acid reflux.
Hiatal hernia is a predisposing factor for developing acid reflux, but, lifestyle, medications, diet, eating habits, all contribute for this.
It;s good to know that many patients after the gallbladder removal experience nausea as very dominant symptom, which belongs to a post gallbladder removal syndrome.
Best wishes!
Marija