Good on you for doing 11 days, and at the most challenging time of year too, that is incredible!
A lot of what you say really resonates with me.
Have you look at online forums for support? I found they really helped me, especially in the very early days.
Do you have anyone in real life that could act as a mentor and support for you? For me, one of the things that helped me hugely was my amazing brother in law, who went sober just over four years ago. Opening up to him helped me hugely, making me feel accountable to an outside person, who knew the struggle, and would encourage me.
It may be that your husband is cynical, after previous efforts, but it would possibly help with that if you explain to him that while you are doing this for you (I really hope you are, because you are the one most worthy of such a huge effort on your part), it is also to benefit him, your relationship, and your family, and it would really help if he could see and acknowledge your effort sometimes. It doesn't have to be huge, rose petals strewn in your path, sign writing in the air, kind of a deal, but the benefits of a quiet, 'well done, I could see this was a challenge tonight, and you didn't buckle', knows no bounds.
As my wonderful and wise BIL said to me, the first 100 days are a bitch, especially if you're white knuckling it. After that, ironically, it does get easier! I empathise with your not having known a sober Christmas since you were 12 - by 13, looking back, I was alcohol dependent already - and it's bloody hard to find new rituals, habits and coping mechanisms, when it's such an entrenched part of your life!
Two things that helped me in the early days, are sober literature (especially 'Mrs D is going without'), and journalling.
Also, you might want to reach out to your GP for some help, yours might not be as fucking useless as mine!
Sending you support, strength, and solidarity. Kia kaha - be strong! You got this, baby puppy!