Rainbow baby support?

Is there already a group for supporting mothers having a rainbow baby? I'd like to talk with others who have this experience. The amount of stress and anxiousness and fear of losing this child is making it incredibly difficult to be happy about those two little lines. I am happy yet completely terrified. Can other mommas having their first child after losing one relate to what I am saying? I'm not just paranoid as others may say! These are legitimate fears. My heart broke once already, I can't fall apart like that ever again. The fear is distracting me from the absolute joy of this positive test. :(