I have not detected any pattern to my migraines, but I do get migraines with aura, so I can tell when they're coming on and can *sometimes* lessen the severity of it. I also get "fallout headaches", as I call them, the next day.
I soon as I feel the numbness in my hands and the visual disturbances, I take my maxalt tablet, a glass of water with a packet of "Emergen'C" in it, and three Excedrin Migraine pills. If I'm not at work, I lie (lay?)down.
If I get to the slurred speech stage and the numbness in my face, I'm a gonner and it's too late - the train has pulled out of the station!
Now I have to say I am not recommending you do what I do to help your headaches. I only meant it as a gauge as to how severe yours are.
I haven't had a migraine for at least three months. Fortunately mine are rare. They are certainly the worst. The worst "worst" is getting the aura while I'm teaching. It's hard to pay attention to your students when your vision goes awry and you can't talk straight!