For me, some months are much better than others, but I have no idea why. I should start keeping track of what suppliments I'm taking when. My problem is that I end up forgetting, often for a week or two.

One thing I've heard is that you use up a lot more magnesium during the last two weeks of your cycle compared to your first, so some extra mg isn't a bad idea, though it's probably already in your calcium suppliment.

(Chocolate is relatively high in magnesium. Coincidence?)