Hey Jenny - I have had this too, in addition to having a lot of hiccups when my bowel is distended. Turns out I have a hiatal hernia (hope I am mentioning the right one - it's the one off the stomach). I believe mine has pushed a little way through the diaphragm, and I believe that when either volume of material in the stomach or excess pressure in the abdomen occur, it causes an irritation of the diaphragm causing the hiccups. I have been told that this is also a strong contributor to the acid reflux that I have, and for which I am taking pariet. Has there been any mention of a hernia for you?