I lost my first, stillbirth at 7 months, probably due to my OB's malpractice. That was thirty-five years ago, and the memory is still painful, although time does ease some of the pain. I firmly believe that it is NOT God's plan, that there is no understandable reason for this. It is incredibly painful experience, and once you have come through this fire, you will have the ability to feel the pain of those who suffer the same loss. Know that you did not do anything to cause this to happen; it's just a painful part of life that happens to some. Acknowledge the pain and the grief and ignore the people who tell you to "move on." Unless they have walked in these shoes, they don't and can't understand.
You and your DH need to recognize that this is one of the things that can tear a couple apart; be careful to let each other deal with the pain in whatever way is most comfortable for them. Each of you be kind to yourself and to each other. My sympathy and prayers are with you.