I’m 41, and for the last couple of years I’ve had increasingly bad PMD, including feeling like I’m coming down with the flu for a day or two before my period arrives. However, for the last 3 months or so I’ve had almost constant headaches and generally felt a bit ill, and my cycles have shortened from 31 days on average to 29, 28 and 27 days. Does this sound like I’ve started perimenopause? I’m also tired all the time and sometimes wake up all sweaty in the mornings.