My mother gets headaches like these. She ends up going to the er and they give her something to 'make it go away'. I tell her these are migraines, but she does not believe me. I say this because back in the day I used to get classical migraines about once a month and around that one migraine I would get about a week or more of headaches that would just not go away... Turns out they were mild migraines... Turns out they did not stay that way with me. Anyway, wish I could tell you what they gave here. But I do not for menestral migraines, even before the preventatives and abortives for severe ones, they suggest a stronger anti-inflamatory before your cycle and during it. I also take a water pill, diaretic, to get rid of water build up, seven days prior to my cycle, to help with just that type of migraine. So you might want to ask your doctor about it, although they may not even clue in that it is a migraine. And maybe not, I get a lot of tension headaches at that time too, tnsion headaches being a bit trigger for migraines naturally. But a severe tension headache can be difficult to treat as well, and I think the same thing would be in order, see a doctor and maybe they could give you a good antir-inflamitory to take at that time.