OP your posts make me sad. You say clearly that you drink to cope with painful emotions. It sounds so very lonely. I have a friend who one day, out of the blue, confessed to having been a secret drinker. She was extremely well-presented, attractive and well off, and I would never have guessed. But it explained so much about her past behaviour, her reticence, her bouts of self-isolation.
You've been coping this way for more than half your life. I feel sorry for your 16-year-old self, who should have been offered a better way to cope, and for all the secretiveness, the desperate strategising, the fear of embarrassment, the little lies that have been part of your life for so long to keep up this habit.
Change can't be easy. But there's a whole different version of yourself that could emerge if you actively look for different ways to handle emotions. Well, a number of different versions, and for it to be a happy one, I'm guessing you need connections with others above all. Not just your husband (though I hope very much that he will be supportive). You need real-life friends, and just human contact, even if it's sitting in a cafe and talking to the barista.
Sorry, this sounds both obvious and patronising (sorry!), but sometimes the obvious things are true (and not so obvious in practice).
This is a big project. Look at everything. Is there a kind of job you'd like to have? Can you get childcare? Whichever way you go about it, I wish you all the best.