Spinning--I just want to say that I think I've felt everything you've posted on here today: that I must be a terrible person for this to have happened in my life, that I am somehow being punished for having wanted another DD so much, that I have had more bad luck than should be due me. I think all of these thoughts are just a normal part of the grieving process, and not at all a sign that you've done anything wrong or that you're at fault in any way.
After all, everyone on here wishes for a healthy baby of their DG--no matter what people may say, wishing for a girl or boy is a common, normal, nearly universal human wish. It is not the cause of chromosomal problems in babies.