You knew the word a moment ago. It was on the tip of your tongue, and then the meeting ended and your sentence ended with 'thingummyjig'. If you are in the menopause transition and your mind suddenly feels unreliable, you are not imagining it, and you are not alone. This book takes the symptom seriously and explains, in plain language, why oestrogen changes affect memory, attention, word-finding and mental stamina. It separates the fog from ordinary stress, anxiety, depression and neurodivergence, and shows how sleep, food, movement and the right daily systems can bring real relief. You will find honest guidance on what to say at work, how to ask for what you need, and which conversations to have with a clinician about hormone therapy and other options. No toxic positivity, no 'just relax', and no pretending this is all in your head. This is a practical companion for a real and often dismissed experience, written for women who need their brain back on their side. Part of The Menopause Companion Library.