What JK98 has said above I could only confirm by my experience with bad candida. I was not tolerating chelation and my gut was terrible. Pain, bloating, everytime I tried to chelate. I would suggest the same - stop the chelation and treat possible candida with a low carb, no sugar, no yeast, no wheat/gluten diet and see if things improve for you and try the DMSA again later as you feel stronger.

If you find the DMSA continues causing these problems, regardless of what efforts you've make, and in spite of reducing possible candida levels, it may not be for you.

You do not have to take DMSA. It is optional, but it can help your body remove mercury and often helps with side effects. Alpha lipoic acid is apparently essential according to cutler. So you could wait out this time (first 3 months) and not chelate at all and simply start ALA on its own once the 3 months are over and use it as a single chelator.

Chlorella is high in sulfur by the way. Cilantro is a brain chelator and there is not a protocol in place to make sure of its safety in chelating mercury.

I'd personally try the diet if you haven't already and go from there and then give DMSA another go in case this is candida related. I could not tolerate DMSA chelation until I dealt with my gut candida. It really had gotten that bad, but I had not noticed it. I thought I was already on a pretty good diet, but it was not enough. There has to be a complete removal of sugar/gluten/yeast from the diet and a reduction in high carbohydrates even in healthy/natural foods if the candida is bad enough. You may get away with a few high carb natural foods, but that will depend on how bad the yeast problem is and how your body responds.