I have the same kind of epilepsy as you- it's affected by my hormones. I actually just started birth control pills (in addition to my Tegretol and Keppra) to even out my hormones, and see if this helps reduce my auras (I've only started this 4 days ago, so I don't really know if it's working yet.

)... But I was the one to suggest this to my doctor. He never really suggested I do anything else to help me around those times of the month...but once I suggested The Pill, he said I could try it to see if it works. Maybe you could give this a try.
I'm surprised that changing the amt of meds you take once a month doesn't affect you at other times.