Ygrec, I'll be 60 this year and am retired. What are the literal facts about your first three years? You might find that helpful looking at what's where, a kind of map or X on the map ;-)

My mother was sick all my life (had a brain tumor from 2 years before I was born) and died when I was 3. So, I had a lot going on in those 3 years that "obviously" contributed to my GAD, even if one just looks at it factually. But having my mother's history (when she went to the hospital, when my father was away and my grandmother came to stay to care for us but left "early", etc.) and my first memory, etc. in there to look at, makes it a little easier going.