r/AdultChildren might be helpful
The organization's name is often ascribed to Janet G. Woititz (c. 1939 - June 7, 1994), an American psychologist and researcher best known for her writings and lectures on the adult children of alcoholic parents, and author of the 1983 book Adult Children of Alcoholics.
The term ACoA was also extended to include PTSD by Tian Dayton, specifically in her book The ACoA Trauma Syndrome.In it she describes how pain from childhood emerges and gets played out in adulthood, for the ACoA, as a post traumatic stress reaction. Childhood pain that has remained relatively dormant for decades can be re-stimulated or "triggered" by the dynamics of intimacy. "Just as a car backfiring triggers a soldier into unconscious memories of gunfire, when the ACoA grows up and enters the intimate relationships of partnering and parenting, the very vulnerability, dependency and closeness of those relationships can trigger unhealed and unconscious pain from childhood."