Dont beat yourself up! What is done is done, go from here. The way this diet works is that this last temporary gain will disappear in no time. Don't waste any more energy looking back, just focus on weight loss to come.
Drinking wine is just like drinking a large glass of pure sugar - I know! It was a regular part of my past life. When I had a drink I also lost any sense so would eat the usual rubbish too. I would never drink a glass of sugar but I did - frequently!
I believed wrongly that I could not go out, could not relax and could not socialise and have fun without it - but I was totally wrong! I can do all of those things and throw away oversized clothes too.
Its was like a crutch - I thought I had to have wine, but infact it was my own set of rules - just in my head - I didn't have to at all.
Hope this helps. Good luck.
GSQ