Feeling emotionally low or mentally drained during your periods is a very common experience among women. The sudden drop in hormones like estrogen and progesterone affects the brain’s serotonin levels, leading to sadness, irritability, and emotional fatigue. 

This, combined with physical symptoms like cramps, back pain, and poor sleep, can make you feel exhausted and down. Iron loss and lack of energy also contribute to this low phase. Simple lifestyle changes like drinking warm fluids, light exercise, healthy food, rest, and self-care can significantly improve your mood. If the sadness becomes intense or frequent, it could be a sign of PMDD (Premenstrual Dysphoric Disorder), and medical advice should be considered. Understanding your body’s rhythm can help you manage these feelings better every month.