Cant remeber b4 i was 5?

ok so this is gonna sound weired.i can remeber anything very sharply after i turned 5 but i cant remeber anything b4 there is one tho i remeber being dead for a total of two minuts i was looking over my greeat grandma who looked scared out of her mind when i blincked i was 5 and dint remeber anything from the previous day....has any one eles exsperinced this?