I've been suffering from headaches every day for over a year and a half. I have tried just about everything to make them go away. I recently started supplementing with Magnesium (not specifically for my headaches), and a few days after taking it daily, my headaches were gone! Then there were a few days where i got lazy and didn't take the magnesium, and my headaches came back! So i took it again, and they went away! AMAZING! You have no idea how huge this discovery is for me!!! I'd highly recommend you give it a try. After getting the results that i did, i thought i'd do a little research online and found a couple websites that you might find helpful:
I wish you the best of luck, it sounds like your headaches are worse than mine have been, but its worth a try.
Just FYI, I've been using "Lifetime" brand liquid magnesium blend (orange vanilla flavor).