Could they be held liable since we tried to tell them for 6 days ?

Last month 1/2014 my wife has a miscarriage. In December we found out she was pregnant and knowing already when our daughter was born in 2008 that this would be a HIGH RISK pregnancy. My wife from day one explained we need to talk about High Risk and we need to know ASAP how far along she is. Appointment set 4-6 weeks out, 2 weeks later wife starts spotting with discomfort. She calls OB explains she is High Risk, 41 years old, has had 2 children, licensed RN of 12 years and something is not right. Nurse at the OB Office blows her off, it's normal 6 days later and we called every day telling them something is not right, things are getting worst, ambulance is called, uncontrollable bleeding and sweating. 10 hours later a D&C is done.. Why didn't they listen, its their job. There is more to this story but I am running out of characters to explain it. Is there anything the OB or his office could be held liable for after all this????