That is awful! They seem to be totally clueless. I'm dismayed not only at the loss to you and to the adoptive child, but at the way that the communication was handled, or mishandled (except for the case worker -- BTW, it might be a good idea to blank out the case worker's cell phone number and personal names in the message you posted, as postings from this group can be turned up via Google).
Will continue to hope and pray for positive results with the pregnancy.