I am 56 years old and about 50 pounds overweight. I have had problems with acid reflux which seems to be under control now with medication. Three days ago I started having a fluttering feeling just below my sterum area. It has continued off and on now for 3 days. It is not painful, and I am pretty sure it is not my heart. I started a healthy lowfat diet and have been walking approximately 40 minutes a day for at least 5 days a week for the last 3 months. I have lost 12 pounds. I have been feeling better and more energetic, until these flutterings ( or spasms) started. They just a nuisance;but , I do wonder what they are and wherther or not I should see a doctor. Over the last couple of years, my family doctor has sent me to a cardiologist and gastro specialists who determined my heart was fine, and that I had acid reflux.