Not to discount your feelings. But for me, my lady hormones made it very difficult for me to catch on to what they were doing to me. Because the slide into depression is slow and subtle, then the switch back to high-normalcy happens literally overnight, and it's like having akid - what pain?! Forgetting the pain of that slow slide into depression because now you're all elated leaves you unprepared for the next slide.
Some doctors will give you 2 weeks of Prozac for this pmdd to take during the slow slide time ie 2 weeks before your period. Then off. Just a suggestion.