I just wanted to report something that I have had success with. I see a Natrualpathic doctor and she has begun a daily preventative dose of Feverfew. This is a long used medicinal herb that has no harmful side effects (as experienced my me or that I can find through research) and has gone a long way to cut down on the number of headaches I have (weather related migraines) and lesson the severity of those that do come on.
Feverfew must be taken in combination with a few other things to be effective on headaches (specific B vitamines and magnesium) so don’t try to treat yourself. I would encourage you to find a local Naturalpathic doctor and talk about this option. The thing about naturalpathic remedies is that most of them are centuries old and well proven. They are again being studies under western research trials.