ADHD often comes with some degree of low-grade anxiety/depression tbh
I remember talking to my therapist about how I’m not worried about forgetting something, I’m always worried about what I haven’t realized I have forgotten and is already causing a problem. I just live in a constant state of “something is on fire I just haven’t smelled the smoke yet.” it’s not quite PTSD, but it is certainly something analogous and it’s always this low level hum of stress. At least that’s what I took from my conversation with her.