If you’re a middle-aged Gen X woman like myself, chances are perimenopause has crept into your life—sometimes subtly, sometimes like a wrecking ball. One day you’re powering through work meetings and remembering every detail of your kid’s school schedule, and the next you’re staring at your laptop wondering why you walked into the room in the first place. Welcome to the world of perimenopause brain fog. Why didn’t anyone warn us?