Hm-m-m-m... well... I wouldn't say I have amnesia.
But as I get older (I'm 69 now) more-&-more of my past seems to be slipping away (except for some of the less pleasant stuff I'd actually prefer to forget.)
I also have pretty-much never had much of any memory of my life prior to around the age of 8. For the most part, it's sort-of like I was born 8 years old.