Why:
I didn't suggest anything about doctors or medical help in my post, sorry if you took that the wrong way. My point about the life or death situation is that you admit you can't control how your habits with many different substances - and that could lead to many bad things in the future like OD, or other possible injuries/events beyond your control while under the influence. I'm just suggesting that you might find a point in time where you can't do this alone - the blunt truth is that some of us need help. And if we don't get it, we eventually succumb to it.
I had suggested reading the big book. You may want to check out some of the other recovery programs such as AVRT that involve more self motivation/control.