I'm so sorry that this are this difficult for you. Have you considered speaking to a therapist? Before she retired my mum was a therapist for people with alcohol dependence.
She always said that complete abstinence programmes were based on cliff edge failure and criticism for having a single sip of wine, rather than looking at the source of the issue and dealing with that. Clients who were told they'd failed often relapsed much worse because they said they may as well.
Her practice was to ask clients to keep a diary of how much they drank and compare it every week. So those who said they couldn't control it and so it was hopeless could be shown that they could control it, rather than have the drink control them.
So when you stopped while conceiving and being pregnant and not drinking since 2 January, you showed you have control rather than the drink controlling you.
There is an aspect that hitting rock bottom might have to happen before you can make a meaningful change. I hope that's not true for you, because rock bottom is really awful, particularly if you lose your marriage or kids as a result.
Do see if you can get some support to look into your reasons for drinking - help about your mum dying before you had the kids - I think you're probably processing a lot of grief over that. No doubt there are other issues too.
You are worth helping. It sounds as though you are conscientious and concerned about the effect you might have on your family. You are asking for help, so please see if you can get some. Take care xx