I drank everyday for 25 years - I am sure I did some damage. As of today I am 69 days sober.
I have had pains in my liver area for a few years - a few weeks into my sobriety the pain went away. I also started to get a strange pain/tingling sensation near my pancreas a few weeks before I quit drinking - that is also gone.
The thoughts of those pains helps be stay sober. I was in denial when I was drinking and didn't care what I was doing to myself.