How strange, I was thinking of starting a thread about my brain fog as waking up this morning I couldn't even think what day it was! I have found the brain fog difficult but it seems to come and go. It is worrying as you think you're going mad but then you read about other women suffering with it during meno, so it's reassuring.
I keep making mistakes at work as well or not remembering things, the other day I couldn't think of the name of someone i work with when I was introducing her to someone, it's really embarrassing!
Could you speak to your Supervisor and explain it's a symptom of meno? I have told my younger boss it's down to peri menopause but I think it goes over her head but she's never pulled me up on any of my mistakes, so I'm glad about that but I can understand how it knocks your confidence.