I saw a new OB/GYN last week (and loved her). Not surprisingly, we talked about headaches and hormones. Turns out she has frequent headaches too, which she thinks are hormonal.
When I asked how they were when she was pregnant, she said that they were better during her pregnancy and while she was breastfeeding. When her milk production slowed down and she began to wean her son, she had a two-week long headache. During this time, of course, her hormone levels were changing. She also said that her friend had the same experience. This is anecdotal of course, but it’s food for thought.
I don’t have any firsthand knowledge of what hormonal headaches are about (I flirted with the idea that mine are menstrual, but am sure they aren’t), but some resources include American Council for Headache Education, the National Headache Foundation and the National Women’s Health Information Center. I found this last resource to be most helpful.