There should be (ideally) a positive and gradual change in the way you feel while on a round of effective chelation, with potentially temporary drop as you end the rounds due to redistribution. But it should be an upwards trend overall.
I have been reading a lot lately.. considering everything, even things people avoid... at some point I would like to try DMPS taken cutler style. I would also like to try chlorelle/cilantro (which supposedly is good at mobilizing and drawing mercury but not good at escorting it out of the body) along with dmsa and ala to minimize any redistribution. Hopefully I will get some more personal experience in the coming months to share and compare.