Memory problems& mental illness

I know depression cptsd and stuff can cause memory issues but they're hitting me hard now and i don't understand.

I keep repeating things people just told me. My bf will point something out to me and a little later I'll be like "woah, look at this"

And i can tell he's getting annoyed by it. I definitely am listening when he tells me stuff, but then my brain just erases it until it's got my attention again. When i point it out he'll be like "i just said that" and then I'll remember him saying that and feel so stupid.

How can I work on this? Will memory games on my phone be enough? Is it just something that might keep getting worse because of my mental illnesses? Am i getting dementia?? I'm only 23.

I remember a lot from my childhood and random things about people i barely knew. So it must be just short term memory issues? I also think i have auditory processing issues, but this feels like I'm straight up deleting things in my brain