Terrified

I lost my baby girl back in October at 20 weeks to placental abruption with no reason for it to happen, I found out yesterday I am pregnant. I am absolutely terrified of it happening again and terrified of losing this baby to anything and everything now. I am trying so hard to stay positive but I am so scared. I want to bring my baby home in March. Anybody go through this and then have a healthy pregnancy and rainbow?