hi bex, im sorry your still feeling so bad, its always hard to say with this illness what causes exactly what. dmsa is really expensive, it should not be that price when us sufferers rely on it, one bottle doesnt last long either, then you have to take other supplements without fail while using the dmsa. i hope you get some relief soon, dawn xx p.s, it took me a long time to feel better after getting dental treatment, but i dont know if it was mercury or anesthetic.