Bex, can I ask why you are sure that most of these problems are due to yeast? Are you going by symptoms?

Because you diet has been so super-clean for so long, I can only think of these reasons why you would have a yeast problem: a) it is sequestering mercury, or b) your immune system isn't functioning well.

Maybe ALA isn't the best chelator for mercury in the gut? Maybe you've got rid of it in certain areas but it's stored up in other areas. This is only a guess of course. Please let us know how things go with the DMSA, best of luck