You say that, usually, your PMS is alleviated by his dominance but that the special circumstances of the memorial made things difficult? In this case, why do you assume that it will always be this bad? Assuming you have handled the grief properly (if not, you may want to think about talking to a good friend or getting counselling) then there is no reason why you should get a repetition of the same problem.
If it does happen again then communication is the key, as always. If you feel as if your PMS is causing bad moods to the extent that you are likely to strike out at him then you tell him. If he feels that you are acting out of character, he should pay attention to that (but not tell you cos I know how women who get told they are 'having PMS' react...This is one exception to the 'communicate' plan) and react accordingly - hugs and affection rather than beatings and gaggings.
If the PMS gets really unbearable, by the way, then you may need to talk to a doctor about dysmenohrea. There are treatments for extreme symptoms of menstruation (cramps, excessive bleeding) which also treat the mood swings at the same time. Usually this involves some form of contraceptive medication - the progesterone pill, injection or implant will, for example, reduce the intensity of menstruation and therefore the symptoms of PMS.