As the others have already mentioned your change in diet is very detoxing in itself and the garlic and humaworm was probably too much esp on an empty stomach (I assume?)
I was on my second round of HW and I had no problem taking them until I started juice fasting. I think it was on the second day morning, I was weak from heavy detox and I took HW without thinking and I became so nauseated I just threw up within an hour. Maybe coz the potency of HW is much more on an empty stomach. Well that was my case anyway.
That is not to say you can't be on a candida diet and take HW at the same time, just suggesting you take it slow. Garlic is a powerful antifungal and so is HW. The more toxic you are the worse your reaction.