I was about 2 months sober when I actually sought to forgive myself for my drunken mistakes. For me, it was another ah ha moment, or spiritual awakening if you will, where I felt an instant physical change. Forgiving myself was one of the more important milestones in my sobriety journey, but it didn't happen right away, and I still have to catch myself now and then and change my thoughts from "regrets over then" to "gratitude for now".