This sounds like Autism. I used to have this with my husband ALL THE TIME.
Before he was diagnosed I was getting ready to leave him - this was 2 years ago - we have been together for 7 years.
It would always be about something that I said. And he would latch onto it. Something menial like hoovering the flat. Or not being somewhere on time. Always worrying about what other people think.
These accusations would fall perfectly in time with someone coming over / or if we was leaving the house to go somewhere
it was all very weird and me looking forward to going somewhere or someone coming over would end up with me in tears and so upset
he was diagnosed 2 years ago and he does these things because he doesn't know how he feels about stuff
he is on sertraline now - an antidepressant and it works wonders for him - I started taking citlapram since last year because the whole thing from years before made me anxious and I ended up staying up all night Alot wondering if these things would happen again as I was always confused
it's was so frustrating pleasing with him to believe me that what he was saying wasn't true
but what they want is the reaction - just to keep calm for now, do not react, just say "ok." Your not admitting that you have "done it" but what you are doing is saving your sanity for now - because he wants the reaction - even though what he is saying is probably pathetic - don't loose yourself in this -
This gives him space to come back later to apologise if he realises he has gone over the top - but don't expect it as this will drive you mad too.
if he doesn't and he keeps picking fights with you and hasn't been courteous enough to talk over the last thing with you, you need to think about leaving - because that is abuse and he is grinding you down
dont bother trying to reason with him
lots of love and keep yourself safe xxx