I'm so sorry to hear your news I don't think it was silly of you to tell your children early on. What you tell them now will probably depend on your beliefs. When my baby passed away we hadn't told anyone yet because we only found out when we came home from our honeymoon, so hadn't really had a chance to tell people yet. In my heart I like to believe that the little soul that would have been my first baby, is now my little boy. The first little baby body I created wasn't perfect, so the little soul waited until I had created a perfect little body for it to inhabit.