@Kiwi Jack
I took my first chelator in Jan 2011 and did my last round in March 2015. In that time I did the equivalent of 300 Cutler rounds. A Cutler round is 3 days and 2 nights. I was doing 4 days and 3 nights. Plus, I was doing some ultra-rounds where I stayed on round a lot longer.
I don't recommend that. What I did was stupid and it took its toll. I had this crazy notion that if I could just get rid of the mercury then the immune system would realize that I had a colon full of polyps and come and save the day. It didn't work out that way.
I pushed too hard. I won't bore you with the details but I lost thyroid and adrenal function but just kept chelating, Even when I had triggered CFS and needed help to stand, I just kept chelating. This is part of the whole Bipolar thing that was part of my symptom-set. People with Bipolar accept that only part of their lives will be livable and tolerate illness.
Sorry to hear that you are having problems. As a word of encouragement your reaction is a continual confirmation that you are on the right track. BTW....not sure if you know this already but I am Brian's brother. He is a moderator on the Cutler facebook and forum sites.
My early struggles had a lot to do with the quality of Vitamin C that I was taking. If you haven't done so yet, switch to liposomal Vitamin C. Make your own and it will be one of the cheapest and bestest things you can do. There is a recipe on this site that I left and I left one on the FDC site as well. Use pharmaceutical grade Vit C which is the L isomer only.
Double check that all the mercury is gone. I had a 2nd dentist do more x-rays when I wasn't getting better.
Some people do a Melisa Test which checks for metal allergies. Those people have it rough and chelate at your levels for 8 years and longer.
You are knocking at the door for the dump phase right now. There are some who find that they can move forward better after that. This thread has some of the other things that have helped me.
http://forums.phoenixrising.me/index.php?threads/mitochondria-mercury-methylation-mycoplasma.40763/