My second husband went through a very similar experience (in his case he wound up in a coma for a week or two, liver and kidneys shut down, told IF he lived he would almost certainly need a liver transplant). Turned out when he got the liver biopsy he had signs of EARLY cirrhosis and if he quit drinking for good he could expect a long life.
A few months later he "slipped" a few times (he was going to AA), then went back to drinking as insanely as before. I eventually had to leave him.
I also know other people who simply DID stop drinking, no program, and appear to be fine. Rare, but it happens. Maybe they were not alcoholics but just heavy drinkers or maybe something else happened to them. Some people do have a "spiritual experience" of a different kind, seemingly. Time will tell.
In the meantime, Al-Anon can be very good for helping you get your own head on straight.