L.L.
You are defintely not alone. I have noticed it since my 10 year old twins were babies. I don't know if it's so much that they align with your cycle, as much as they pick up on your energy. And no matter how calm and cool you act, they pick up on the real stuff underneathe. The days that you need them most to be mellow and not needy are the days that they are the total opposite. There may be something to the cycle thing, because my husband started working out of the home four years ago, and I swear, when I am pmsing,(and doing a pretty good job of not letting on) he is moody and irritable with me and the girls.
I looooove a product called premsyn pms. I get it at Rite aide and I buy three bottles at a time because while pamprin and midol sit on the shelves. This stuff is sold out .Also, I tried to have an adult over if possibe when they were young. For some reason, someone elses energy made a huge difference. Or have a playdate as long as the mom sticks around. Lastly, I had "no agenda" days whenever I could. Trying to stick to an agenda just created more frustration due to not being able to accomplish anything. I found the days I kept the to do list blank were so much easier. Good Luck