Memories that were actually dreams?

About a month or two ago I began experiencing this weird thing where I confuse my dreams with reality because the dreams have been about normal life for the most part. And up until now it’s been relatively benign from what I can tell, just every other night or so I’d have a dream, and wake up and go about my day thinking some detail from it actually happened. It sucks when it’s a bad dream about social isolation, but it was nothing serious really. But just earlier today I learned my sister is single, but because I saw in a dream that she’s been seeing someone for a month. And yesterday I realized that someone I know is still alive, having dreamt a few days ago that they died. I’ve been going on with my life having thought this person died, having thought I mourned for them, only for it to have never happened. I’m curious if anyone else has experienced this or something similar. Or if anyone has an explanation?