On a large desktop calendar, chart the following…
menses: number of days, i.e 1-5
severity: 1 thru 10, 10 being most severe
time of day headache developed, and duration - i.e. 8 am, 4 pm
food: most recent meal, beverage, or snacks before the onset of headache
anxiety/stress level: 1 thru 10, especially 1 - several days before onset of headache
quality of sleep the night before: a good or disturbed night’s sleep