I have very clear memories and some fleeting impressions from around 2/3 onwards.
However, it was an abusive childhood and I was constantly being told I'd made things up, that I 'got funny ideas' and 'dreamed it' - and if it was something I didn't know, I'd be told 'You did know, but you forgot'. Eventually, the narrative became that I constantly lied and/or was mental.
On the whole, I have a very good memory - I always did really well at school because I remembered lots of information (mostly as images and actions, rather than lists of words). So I think that my memories are more likely to be accurate than the person who did the abusing and her minions others with a vested interest in the other versions. Another relative confirmed a lot of things had happened previously in the way they happened to me, too. The aftereffects of that were, amongst other crap, absolutely no sense of boundaries or healthy relationships, so there are large stretches in my twenties that are an uncomfortable blur partly through the medium of a fuckton of booze at times and sleep deprivation at others
But I still don't trust myself to remember things.
I upset DP today because he got me talking about 'Stuff' (context is bereavement and having to see the abuser and play nicely in order to not be pushed away/loudly and literally violently rejected whilst being made out to be the abusive, mental one) and I asked him to read messages I'd sent to somebody else before I'd met him, not because he disbelieved me, but because I couldn't trust what I'd told him before and thought that reading ones I'd sent at the time would be more accurate or trustworthy than my own memory.
He cried and told me I was damaged, it wasn't my fault and he already believed every word before he read them.
What worries me is Alzheimers. What if I forget him - but remember other things that I have blocked out?