Chinese Drywall!

We have a brand new home with Chinese Drywall. Our builder did not tell us he used this material until we found it and confronted him. There are minimal test reports that state we have greater than 1200 PPM in the few boards they tested with no significant sulfur emissions. We have experienced numerous health problems and electrical issues. We are concerned that the 1200 PPM may be much greater when all sheets are compounded within home. How certain can we be that there is a direct link from the emissions to our health and electrical issues? Does anyone have any qualified advice?