I'm 47 and for the last few years have noticed my periods have gone from 5 days to 4 in length, often with day 1 being very light, a bit like a faltering start. My cycle has always been short about 24 days but today after only 14 days I have started a full on sudden period. I guess it's probably menopausal but do you need to see a GP to confirm this or just let nature get on with it?