and faire is spot on. You've come back on here and that IS part of your steps to recovery again.
Don't worry for the moment about why this happened - there's plenty of time to analyse that later. For the moment think of yourself as being in the emergency room, and focus on doing something good every minute and every second - absoloutely anything that will take you away from the poison that you have been drinking.
It is not surprising that you feel so terribly dreadful, physically and mentally, (and lets leave the emotional side of this for a bit). Your body is unaccustomed to what you have put it through over the past couple of weeks, and if you dh is right and you've been overworking it, then you probably weren't in the best place to start with.
But you know, and I know, and others know, that little by little, with some gentleness and care you will come out of this pit. You don't have to try and scrabble out of this slippery place on your own. There are plenty around you who will gently, but strongly lean in and give you a helping hand. Some of us will even (metaphorically) get in the pit alongside you, so you can stand on their shoulders to get out. So use us, GO TO AA, let you dh help you and encourage you, talk to him (not about why it happened, but how you are going to get better NOW), let your friends help you.
Can you bear to read the first thread that you posted? Can you map out what you did then that helped you to find your way? Treat it with as much rigour as you would treat any work project. Get focused, get planning, order in all the juices / teas and food that you know are good for you, and will help you to heal. Have a schedule of AA meetings to go to (even the crappy one in distant far away towns). Ignore work and focus on yourself - you are the most important project in your world at the moment.
And know, from the experience of your own body, that however difficult and awful and tough this seem this morning, you can feel better, you will feel better. And then you will have learned some other new things in this great experiment of life - you will have learned that maybe the danger still lurks, you will have learned that you still have the inner drive to overcome it, you will have learned that all around you are people who want to be on this journey alongside you, you will have learned that even when the worst comes to the worst and you accidentally (or deliberately) jump into the black pit that even still all is not lost.