Hi Krass, and welcome!
I've experienced that "dull ache" - by the very description I know exactly what you're referring to. It never bothered me regularly however, but mostly after a particularly rough night.
I went to detox around 6 weeks ago and my liver enzymes were only slightly elevated - much to my relief. I haven't felt the aching since detox; though I have relapsed twice in that time each time it was just for one night and then I got back on the wagon.
Fear of death SHOULD be enough to keep us from drinking but because we are addicts it is not. Learning to shut off our alcoholic voices is REALLY hard to do, and I just posted about that minutes ago. But we just have to keep trying.
Good luck. I look forward to reading your posts.