I had a similar reaction when taking probiotics to attack my candida infection. However, as candia accumulates plenty of mercury, when you attack the candida infection mercury is released into the system. Garlic is a strong anti-fungal, and so would do the same thing as the probiotics that I was taking.

Strangly enough I can take probiotics and garlic, which helps a lot, just fine now. I'd suggest going slowly at the start -- you don't want more mercury released into your system than you can handle. Not that I took it, but align may help you deal with more mercury. It's had many postive comments.