You say you don't need much from anyone on here but the fact you have posted means you obviously need to tell someone about how you feel and what is going on.
I know it can't be easy admitting you have "slipped" and have, what is obviously going to be, a difficult situation coming up but as you said focus in the day. Get through one day at a time, it doesn't matter how you do it or what anyone else thinks or does, be selfish in your desire to not drink. You will ultimately be better for it and become the person that you would like to be.
You can do this. Never doubt that.