Hi Pitty,
I am sorry this happened. I see some positives there: you had a "controlled drinking" night, you didn't let it affect your will to sober up and you are right back at it today...
BUT,
Please don't think I am trying to have a go at you, but in the past I have done similar things which slowly, sometimes very slowly, got me drinking more regularly and eventually got me back to square 1. Because I really don't want this to happen to you, a fellow A-teamer, maybe it's a good idea to see what was missing on your recovery plan that so that when you are faced with the same situation again you have a way to stop it.
Again, please don't take this negatively, looks like you are in a happy place and by all means you should be because yesterday doesn't erase the awesome work you've done so far!
P