could be or it could be just the normal. most kids don't remember things below 5 years old unless it is something that makes a big impression on them like moving, going to an amusement park for the first time and things like that. if things were just the normal same thing day in and day out kids dont usually remember it. when my child was 9 he didn't remember simple things but remembered taking an airplane somewhere or a bus on a big trip, he doesnt remember which appartment is which because here they all look the same but does remember meeting his father for the first time. he doesn't remember each and every bus ride we took in his whole life but does remember the one bus ride when we were going to meet his father for the first time. normally children remember what makes an impression on them otherwise its like the brain says who cases been there done that kind of thing.

So what you are experiencing could just be normal for you or it could be related to dissociation if what you are not remembering is a traumatic event.