Insisting they said something but they didnt

Dx medicated(Adderall er) husband seems to struggle with this a lot lately. I'm not sure if it's due to being overwhelmed or if they have a reality that's like..different..but this weekend alone has been so difficult with "I told you.." is it just a memory thing? He also leaves the oven on every single time he cooks...

I looked outside and he was nowhere to be found after saying he was putting gas in his car from gas tanks we had filled from the hurricane (which he said he was doing) when i messaged him he said he told me he was leaving and to phone him if I need him.. never said.. I'd have started to work on cleaning..

I'm just not sure what to say in moments like this.. or what to do..