When i am on my period my depression/anxiety is 10x worse. i will think of dark thoughts and of death. after my flow it's not as intence? why?

Fluctuating hormones: During a woman's monthly cycle hormonal fluctuations which signal or trigger the menstrual period can also make women angry, irritable, generally not very amorous, and in some cases can exacerbate or bring on bouts of feeling low and depression. If you have thoughts about death my impression is that's a bit extreme so I think you should talk to your doctor about that in particular.