I am almost 40, no period for almost two years whilst pregnant and breastfeeding DD. Had thyroid function tested in this time as have been having revolting night sweats since DD was born but results were normal. I stopped feeding three months ago and have since had four periods. My cycle length has become even shorter than before I got pregnant, (it has gone from 24-25 days to 20-21 days). PMT is far worse plus ongoing night sweats. I am becoming increasingly anxious that I am now in perimenopause and will not be able to try for a sibling for DD. Has anyone had experience of this? What do I need to ask my GP for in terms of tests that could confirm or rule out perimenopause? Many thanks for any advice.