Like Ghostlight I have escaped with my health, with complete amazement, after many years of heavy and progressive drinking. The liver is an amazingly resilient organ for some of us (but not all). How your health has been affected has a lot to do with things out of your control, like dumb luck, genes, or, perhaps, providence. All that being said, alcohol takes a toll on you systemically, so your decision to stop, if only for your health, is a sound one.
Congratulations on your decision and on day 3!