I agree with IvanMike, that year is still there, and the fact that you are on here today shows you want to be sober. I only have four months, would love to hear what worked for you to get a year.
Is there someone at work you have a good/trusting relationship that you can call and talk to about the other night? I am a worrier as well, and I know I can tend to start imagining worst case scenarios. At least then you will know what you are dealing with when you go to work tomorrow.