Feeling bad between chelation rounds

I am mercury and lead poisonned. My ND put me on DMSA Protochol 100mg or 150mg every 4 hours, and 16 pills of chlorella per day. I am chelating 4 days on 10 days off.
I weigh 150lbs. I did 3 rounds. No problems when I am on, except sometimes a bit dizzy if I change position quick. I just feel awful 2 days after the rounds until I chelate again. I ache. I am nauseous. I see blury. My ADD gets worse. I feel like I should stay on. Any suggestions?