I fell off a countertop and got a concussion when I was 2.5, it's a very vivid and painful memory. I also moved to a different state when I was 5. I have a ver

I fell off a countertop and got a concussion when I was 2.5, it's a very vivid and painful memory. I also moved to a different state when I was 5. I have a very clear delineation of before and after the age of 5, and I have hundreds of memories from before the move. Most are rather intense events, but I even remember the layout of my house, construction sites, my daycare, neighbors, friends houses, holidays, first bike ride, first lizard I caught, my pets, even some dreams I had, etc... I didn't have a good idea of time yet, but I can retroactively tell when things occurred based on facts I later learned, like when certain neighbors moved, even my sister was born, etc...