What Is The Treatment For A Heart Murmur?

hi. my 2 yr old daughter was diagnosed with a heart murmur last year and was sent to see a pediatric cardiologist. my daughter was really unsettled and cried all the way through the examanation, the doctor said she was okay and that was basically it. Ive recently become worried because when she really hurts herself and cries she goes limp and her eyes start rolling. I dont feel that she was checked properly as she was very unsettled. could you please tell me if that is just something kids do. ive got a 4yr old son and never been through anything like this with him.