Hello~I have days when I belch constantly and they are loud, I could win a contest. For me, it is my hiatal hernia, as it pushes through my diaphragm, it can cause acid reflux, I never have heart-burn either but do at times belch back acid. I would ask about an endoscopy, this will show what is going on and then the doctor should be able to prescribe the proper meds and any other help you may need.