The consumers I work with have menstrual charts for the staff to keep track of their cycles and make sure everyone is regular and whatnot... This appealed to my inner nerd so much that I grabbed a chart and charted all last year... it was pretty interesting!!

And I realized that 95% of the times that I get upset and cry and think my partner is insensitive fall within The Week Before. I used to think PMS was a joke for all the reasons you listed, but after charting, I realized that they didn't make it up, they just exploited us over it to make money.