I have been depressed since my period ended

I am typically a happy person and it is unlike me to be sad. I have had anxiety in the past and have self harmed before, but it's been over a year since then. My period ended Friday and since then I have cried everyday, had extreme anxiety, wanted to harm myself, have had a low sex drive, wanted to be alone, and I have not enjoyed things as I usually would. Could my depression have something to do with my period ending? I am also very anemic and wondering if that could have anything to do with it.