yes, I've seen them, various types from flukes to whole worms. I also had practically every parasite related sign and symptom, thankfully, most of these are gone now. I was anemic (iron and B12) and high IgE as well, which is classic for parasitic infection.
and I feel them move. very creepy, but that's the truth of it. once someone feels this, there's no doubt about what you're feeling.... it's distinct directed movement of something in the intestines, you absolutely know this is something moving on it's own. it's not parastalysis. I once had a doctor say to me (when I went to doctors and actually told them my symptoms) she said it's probably gas. lol. that would be much simplier.
I think, if you don't have symptoms or only vague ones, if there are some parasites, it's not at high level. if you're wondering if they may be there or not, this also is very good because when they have become a problem, you know without a doubt. and if you're able to take massive amounts of garlic without feeling them, at least in my experience, that's great, because when there are high numbers, they go insane with that amount of fresh garlic..and you feel that.
I didn't mean to throw things in another direction...only as a possible reason for the panic....I think you're doing good in what you're doing already actually.