Our son was stillborn and our premature daughter died two hours after her birth.
We both got varying degrees of support.
I can fully understand the arguments here saying that the OP's husband has been through the same loss and is now equally part of the new pregnancy.
But physically, it's just her.
And after two losses, a lot of examinations, an infection that nearly killed me, several operations, check-ups, scans and all the normal changes and effects of pregnancy that DH couldn't share, it felt very much like a violation every time anyone had to look at or touch me. After our daughter was born I was dangerously ill, they prepared DH for losing me as well, and afterwards I couldn't walk unaided for over a week, I was taking all sorts of medication. And both times, after losing our son and then our daughter, both in the same year and within eleven months of each other, we had questions from everybody about what happened and what we were going to do next, would we try again, should we try again. On and on and on.
By the time our DS, now almost three, was born, I felt like I had been beaten up, I felt like the whole world had seen me naked or half naked, crying, vulnerable, unconscious, sick, bleeding or grieving. Total strangers had poked and prodded at me, operated on me, questioned me, injected me, taken samples from me, etc.
I wanted some privacy. I wanted my body to be mine, not public property up for discussion and not for anyone with a white coat to come along and examine.
My MIL is a gossip and a drama queen and she had a field day talking about me to every single person who would listen and she quiet happily rang up to tell me all the things that they had talked about and the conclusions they had reached about what was "wrong" with me.
Even now, just under five years since we lost our son, just over four years since we lost our daughter and almost three years since we were lucky enough to have our living son, all of this upsets me.
So even though I understand the OP's husband needing some support from someone, I don't think the OP needs this kicking that she is getting from some of the posters on here for feeling hurt and upset that the first thing he did, immediately after she told him she wanted to keep it quiet for a short time, was to immediately tell someone else and then lie to her about it.