Hi, thanks for the query. I understand it. * Fluttering behind breast bone..( not oain )along with pain in pelvic area can be due to digestive problem.. leading to gas collection.. which can raise up behind the breast bone or press down in pelvis to cause pressure there.. it can move any where in abdominal cavity to right or left side too. To prevent this- - You need to investigate & find any bowel infection/ digestive deficiency/ food allergies,/ IBS symptoms & get proper treatment to over rule it & gain normal digestion. with help of a gastroenterologist. - Need to be corrected. abnormal eating habits. .. - Healthy eating with sufficient fibers & water is important, - Regular exercises help digestive health - YOu can get digestive enzyme preparation to aid digestion. * Alternatively fluttering behind middle breast bone ( sternum ) along with pressure, pain & palpitation needs a consultation of a cardiologist. Thanks.