Do Dr. Clark's protocol. It kills all parasites of all kinds, period. Read how to do it right, instead of slap-dash zapping here and there.
And I still say cadmium---try tapping as I said. It will only take less than a minute--what have you got to lose, besides what sounds more like spasms than parasites to me.
I've never 'felt' a parasite (it exposes them, when they're trying to hide--why wiggle enough to be felt??) But I have had blood vessel spasms, which were painful but felt like crawling.