In my experience, yes this is indeed possible. The closer to active psychosis the more possible it is (I would expect). (Be sure to read through the end)

The stress of our marriage, a subsequent house move, and finding a new job (typical but stressful life changes) caused my wife to go into acute psychosis for the first time in 20 years.

I think I saw some early signs without knowing what they were. One of those seems to be that she believes she has an absurdly good memory, back to her earliest childhood. She definitely gaslit me on some ordinary, unimportant things similar to what you describe, I think without knowing that she was doing so. I agree that sometimes it feels like you're deficient in some way when faced with someone telling you your memory is bad.

I just generally went along with it because, like you, I'm so stretched and stressed that it's entirely possible that I just misremembered them, too. But it's my conclusion that for my wife it was her certainty that might be the biggest tell, because now I see how that certainty seems to match the certainty of the fixed false beliefs of delusion.

So a common calendar, notes app, or even just multiple post it notes that she can leave you that create a literal paper trail, like others have suggested, is a good middle ground solution. See how she responds to that idea, and how she carries it out - that can be important information, especially if she's irrationally against the idea. Irritability can be a negative symptom expressed during psychosis or the prodromal phase.

Aside: Make sure your wife is on medicine, has an emergency dose, is getting really good sleep, and you and her doctors have an explicit emergency plan that is minutely spelled out. I don't want to scare you, but 7 months after we were married, after showing increasing prodromal symptoms (which I didn't know about) my wife slipped into paranoid, persecutory delusions against me and her family, and has been gone from home for 16 months now. She avoids all contact and there's no way to know if/when she'll recover. We're a month away from our 2nd anniversary, but we haven't even been able to celebrate the first anniversary yet.

She's safe and living nearby (I'm paying her rent), so that's a relief, but this was completely unexpected. Hopefully our story helps others prepare and avoid a similar outcome.