Hi there, I did the same thing about 3 years ago ,i went out and told myself i would just have one drink after being sober for 3 months and this ''one drink'' set me on a 3 year binge of excessive drinking. im only just starting out sober again ,im on day 15. If you are doing well at work whilst getting smashed all the time, imagine how good you could do when u are 100% sober and focus!! good luck