I find this forum addictive, too -- in part because there is so MUCH information here -- about Oil Pulling, but lots of other things.
OP cleared up my skin a great deal, fast. It got worse and then WAY better. So don't freak if it gets seemingly horrible for a day or two -- my "healing crisis" came and went pretty quickly.
I have added oregano oil to various other oils (olive, sunflower, coconut, sesame), which I like. I think the point is just to find the oil that works for you, but then to switch, too, as people seem to reach an oil plateau and then experience new benefits and levels of old benefits when they make a switch to a new oil, too.
If you read through some of the posts, I think what you will find is that the Acne is but a symptom of your body trying to eliminate toxins. So the oil pulling will help, but it's what goes in that counts.
I stopped drinking altogether a few years ago and for what it's worth, my skin did not improve a whole lot. I was drinking quite a bit over many many years and I am sure it was more that the alcohol has just disrupted my entire body. But you could try stopping and see if that makes a difference...