My PMT was marvellously better when I went on a monophasic low-dose combined pill. I felt "normal" for the time I was on it, in comparison to horrible horrible PMT that i had when I was younger.

The other thing that i have found to be MOST effective in balancing mood, concentration, stamina, etc during the week prior to my period, is a healthy low-GI diet. It even helps prevent symptoms like swelling and aching of legs and ankles. Worth a try!!