scared to death

Is there anyone else out here that previously had a child that the whole entire pregnancy they didn't know anything was wrong with it and as soon as your baby is born it's basically told it will die I'm pregnant again and I'm so scared that something will be wrong with my child.how do I cope with the fact that I'm scared to death of the unknown? My baby was only given a 2% survival rate and I think God every day that he is still here but I'm in so much fear this baby will be sick as well..