Oh, the period mood thing almost drove me crazy until I was in my 30's. It came back milder in my mid-40's with perimenopause.

I would go to regular doctor and gynecologist and get all my hormones, blood, urine, etc. checked and make sure I didn't have a hormone thing that could be balanced better and I'd play around with vitamins (they were helpful to me but we're talking back in the early 1970's when the wholistic/vitamin/hippie thing was pretty "new"), read some nutrition books and see if I could make a dent in my moods that way.

How Food Affects Your Moods