I was using the feverfew long before I concerned myself with the teeth by the way and I was headache free after suffering for several years. Even when i got big deal mercury poisoning I was still headache free for a couple months, and i hadn't used feverfew most of that time, but I guess it was in my system or else my body had really stopped making wjatever it was that caused the headaches. Feverfew really is the first item you want on your list as a headache sufferer, it will keep headaches away no matter what your mercury or other toxin levels are. You won't make progress with the headaches sticking around, I surely couldn't. Replacing amalgams won't help the headaches immediately either.

Get the feverfew and start using it right away, you should be headache free within a couple weeks at most. Stay on it and grow some. It's ok to take a bit more than the recommended daily dose at first till the headaches subside. Don't overdo vitamin C with migraines, it makes them worse. i generally use only 1000 mgs-2000 mgs C per day maximum, usually less.