rainbow baby!!

So I had a late term miscarriage, (27 weeks) due to a chromosome abnormality in October. I just found out I'm pregnant again and I am terrified. What if it happens again? I mean, what are the odds that it could? I am having a hard time being excities with all this worry. I have not told my husband yet. I am so scared to tell him. I don't know how to handle this. I am TERRIFIED!