No two women experience menopause or perimenopause the same. Menopause occurs because of the winding-down of the reproductive cycle, as the hormonal system moves from its reproductive function to "maintenance" for the rest of your life.
Think of your life in phases: you start with infancy, move onto childhood, and then reach puberty. At this point, your hormones start raging, your body feels like it doesn't belong to you, and your moods may abruptly swing from silly to dejected. So years later, if you're experiencing menopausal symptoms, it may certainly seem like you've been there before! However, the years surrounding menopause can be a time to define your own experiences and take control.