My opinion, you definitely should not go the ALA routine on your own. You should make haste to find a good DR who deals with heavy metal toxicity on regular basis and follow his advice,. Everyone is different and you may have a combination of things (metals) going on. Your Dr can test for that.

Do not give up chelating, the first several weeks are always very difficult. But you definitely need to take the time and spend the money with a specialist Dr. This is your life. You can spend it screaming or you can spend some money which I know you hate to part with as much as I do, but we only have so many days and years to live so make the most of them. there's not really any reason to suffer.

And sue the dentist, please.