So sorry for you.
I had a scan last year on Dec 8th (my sister's Birthday and 4 days before my DP's Birthday on 12th Dec) where they discovered my 16 week pregnancy had ended somewhere around 12 weeks+
I had no idea that my baby had died, despite the fact this was to be my fourth baby. I guess, looking back, i probably did feel the movements stop but it was so early on to be feeling them anyway I hardly took any notice.
One of the hardest things, i found, was having to cope with not knowing, and not having the opportunity to know why this happened. It doesn't matter how statistically 'normal' it is for this to happen, as it feels so wrong when it is your baby.
Sadly, although I delivered the baby on DP's Birthday after an induction in Hospital (no bleeding or cramping, still no sign apart from the scan that my pregnancy had ended) I had severe complications and was admitted on Christmas Eve after a sad and mad panic to find somewhere for our 5, 4 and 2 year old to go for Christmas. We didn't return home until 2 days after Boxing Day. Our poor children had been separated on Christmas Day, not only from us but also from one another due to our friends not having space for all three, etc.
The reason I mention all this apart from the catharticism from my point of view (sorry) is that I wonder how the fact that it is Christmas is affecting you? It is almost irrelevent in the scheme of things in one sense, but (I find) in another it makes it all very much sadder and deeply regretful.
I also wondered whether you were having thoughts about how this will make you feel Christmasses and New Year's Eves to come? Maybe it IS irrelevemt to you, but in case it is making your bitterness even harder to bear, I hope I can comfort you in some small way in telling you that this Christmas, although filled with memories (happy and sad) of Delilah's (as we named her) Birthday, we have been able to look forwards and not back with regret and enjoy Christmas once again.
We didn't celebrate DP's Birthday this year (at DP's request) and had a rather subdued day on the 12th but I am confident that we have succeeded in moving on positively.
We didn't try again for pregnancy, mainly because we have three children already. In your shoes, however, I would be exactly the same as you and would definitely find being pg again the best thing to help.
Focus on your recovery, emotionally and physically and look forward to hopefully a future pregnancy in this New Year. I think that the fact that this was essentially an early miscarriage bodes better for a healthy second pregnancy than if it had been a later one.
Thinking of you, your (wonderful) DH and your little one and wishing you all that you wish for in this New Year.
PS I found that it took a long time for my partner's grief to come to the surafce fully, despite the fact that we talked about it a lot. Also, he was more upset, a year on than me which I think I was surprised about.
Ohhhh poor you. I am sorry there is nothing really helpful I can say.