If you have Trich I can almost guarantee you you have Met Yok and Paragonimus too... Might want to check those.
EDIT- Chronic pain is usually caused by lymph blockages. Check Leishmania (carries HHV6, Hodgkin's Lymphoma).
Plugged up lymph was the reason I was never able to get ALA or DMSA to work for me. I just got worse and worse. It wasn't until I started zappicating my body (especially lymph node areas) that I began to make progress. Zappicating the liver and bile duct area provides such enormous relief, I don't even know how to describe it... For $7-$8 a loudspeaker will do just as much as a Beck magpulser. They even do Reverse Alchemy.
Another thing that's been a breakthrough is taking 1/2tsp of olive oil with each dose of chelators. And of course, keeping the pineal frq on for as long as possible. As soon as I turn it off I start feeling metal head back up towards the head...