I believe that my earliest memory is a rather traumatic one, in which I tumbled down some staris as a toddler. I think I was around around three years old at the time because it was before I moved to my current house. I don't remember much of the lead up events or those after the fall, aside from obviously crying and drawing no enjoyment from the experience. I would say I might be continuous with that personality because I am still clumsy as **** most of the time.
Traumatic memories stick, that's for sure. Plenty of evidence and articles on that subject if you just do a quick google search. I was gonna do PTSD for my paper topic but seems like too many people are doing it, anyway this was covered in class as well and I can totally relate!