My earliest memory is from when I was about 4 years old. It was the day before Thanksgiving and I was running around the front formal room in our house. At one point I must've gotten dizzy or lost my balance becasue I ran full force into the corner of the piano bench. I didn't have to get stitches or but I had to wear this hideous thing called a butterfly band-aid. I remember when my Dad was taking care of it (he's a doctor) my older brother was peeking over his shoulder and said he could see my brain, but really it was just muscle or something. I still have a dent in my forehead from it.
My personality back then seems like a different person back then than I am now. I know it's still me, but it feels disconnected because it's so distant.
I wonder how much of the memory you actually remember from when it happened and how much of it you think you remember but really just heard from others. Because I wonder the same thing about myself from when I had the same thing happen to me when I was about 5.
When I was 4 my brothers and sisters were chasing me around the house and I ran into a table and hit my mouth on it. I wonder the same thing, whether this is actually something I remember or something I just believe to be true because I have heard my family talking about it.
For my earliest memory, I wrote about when i cracked my head on a coffee table at the age of 3.5. I actually had to get stitches and I also still have the scar on my forehead. I also agree with the other posters about not remembering everything from your own experience, but using what you were told to piece together the puzzle.