I had a recent slip of my own, but it wasnt one day. It was very gradual of the residual effects were the same, as in I started drinking every day again.
Well today marks day 2. And tomorrow will be your day 2. Just try adding one more day each day... I felt pretty down myself, but now I am feeling better and today was a good morning (well better than previous ones) and I hope tomorrow is better than today. This afternoon is a little rough but I am managing. Good luck.