I think it is a VSD or ASD and these re not very serious and an echo can confirm your doubts. A ventricular septal defect is a common heart defect most often present at birth, but can occur in adults after surgery or a heart attack. It involves a hole in the wall between the heart's lower chambers.
Symptoms may include a bluish tint to the skin, lips and fingernails, along with poor feeding, poor weight gain and fast breathing.
Most holes close on their own, though many may need surgery or a catheter-based procedure to close the hole. Symptoms can be treated with blood pressure medicines or diuretics. ASDs that aren't diagnosed until adulthood can damage the heart and lungs, shortening life.
Many babies born with ASDs don't have symptoms. By the age of 30, adults may notice symptoms such as shortness of breath, heart palpitations, fatigue, swelling in the legs, feet or abdomen and heart murmurs.
Small ASDs may close on their own. Medium-to-large-sized ASDs may need closure by device or surgical correction.