I second that book suggestion by ahubb2000! It's got tons of good suggestions. I had really bad mood swings with my PMS, including lots of crying in very inappropriate times (like in front of my whole lab before having to give a lab meeting... yeah) Anyway, mine was bad on the pill too, worse actually.
Now I take the vitamin supplement recommended in that book. It's called Optivite, and it rocks! :>) Seriously, my husband calls them my "happy" pills. It's just a special multivitamin with lots of B vitamins and C, and a bunch of other things too. My mood has been so much better in the weeks before my period and also I have more energy and a MUCH larger libido in the "safe" phase III (we use sympto-thermal bc, NFP) which is great!
Anyway, Optivite worked for me (after about 1 month on them) (dang, now I'm sounding like a commercial! Seriously, I don't work for them or anything!!!) Hope you can find something that helps!!
DD (2006) and DD (2009) and