How do i go about filing for Failure to Diagnose ,which was the result of me loosing my son at birth i was 5 1/2 months pregnant .

Nov, 4th 2010 i had my prenatal visit and was told all was well even after telling my docotr that i had started having back pain and mild pains in my abdominal area, On Nov,5th i worke up and was having server pains in my lower back and abdominal area. I call my docotrs office and was told to come in at 11:15 that morning, while see the docotor in informed him of the pains that i was having being that i have never had them befor.. He informed me to take tylonol, and est some fiber one cereal because he felt that i was constipated,(enough through i informed him that i had,had a movement that morning) he listen to the heart beat of my child and it was at 152 beat a min. After leaving the Docotrs office and buying the medicine and cereal i went home to lay down. At 1:30 that afternoon my water broke and my son die 15 min after giving birth. The emerangy docotor was shocked to learn that i had been seen earlier that day and no treatment are testing had been done earlier.