My periods are very regular 28 days on teh nose never deviates. I have always suffered from pms sore boobs bloating moods etc for about 3 days and relief as soon as it starts. In the last 4 months this has changed and the pmt is not bad at all and sometimes non existent but as soon as the period starts I am all over the place exhausted light headed and shaky and a bit fluey. been to doc as am 47 and thinking menopause but he says no Had blood tests and all 'levels' still normal in his opinion plus actually periods unchanged. I am in a real state today and feel like just going to bed til its over!