How has anxiety affected your period? I remember in the days before anxiety, my periods came and went like a breeze. When my anxiety started getting really bad, I began to dread my period. I now get very heavy bleeding, dizziness, and two weeks of PMS that come with awful mood swings, and feeling faint. I was wondering if anxiety itself can cause these new symptoms. I am slightly anemic but I have that taken care of with iron tablets. Yet, I was wondering why my anxiety so drastically changed my period and the way it felt.....