I feel your pain.
It happens on several levels. I am back at work, and it is a struggle. Oh, I saw this client last week? Really? Never saw them before in my life. Would swear it in court. Oh, there are my notes from last week, my handwriting... and my performance and bookings are based on keeping all this together. I am a year off from very needed pay raises because of this very thing.
it has only been the past few weeks that I have begun to read and learn about mast cell activation. @ ahmo's post above has my total attention on this memory issue. I began quercetin a couple of weeks ago with amazing results. I almost feel back in my own skin, more like the person I used to be, so this concept can be a huge part for some of us.
It is mental torture, playing with your own head trying to figure out what you don't know you don't know!

Chill and just let yourself be in the moment sometimes. It is okay.
I feel lucky at the end of the day sometimes that I remember my own name and how to get home, because nothing else happens. Bills, phone calls, food needs, whatever, all get bumped because I cannot remember what needs to happen next.