Heartbroken

Yesterday, I got a call from the doctors office saying that my baby boy may possibly have "Smith Lemli Opitz syndrome" or "steroid sulfatase deficiency." This is blood drawn from my second trimester genetics testing. I'm so heartbroken and can't think. I've been crying since I received the news. I spoke with a genetics counselor today, and I have to go in for an ultrasound next Thursday, and I agreed to go along with the amniocentesis for better results. I'm nervous and scared. I'm not sure that if all comes back positive that I would be able to continue with my pregnancy to care for a child with special needs. Am i wrong to feel this way?I have 4 children already, and all are healthy. I'm praying that this was just an error in my blood work.