Right, that's how PMS or PMDD was for me. I used the same words: broke one day, SUI; broke NEXT day, FINE! Like a light switch.

The "major thing" happening to destroy my good mood was usually talking to my mother - I NEVER realized how much she criticized me until I asked her to go a day without doing it while I was living with her - and we couldn't even make it to lunchtime. AND she would NOT apologize for the criticism that broke the "fast". And just being unable to handle life in general. It was a horrible roller coaster, and eventually I fell off.

Anyway, I moved out and started doing NOTHING - figuring my peace of mind was necessary to my healing, which was necessary to my survival, which was necessary to my ever becoming productive again.

I hope you can hang on. I have come to hate the words, "this time".