Wow. Everything you've said here mirrors my experience right down to the symptoms and how you feel when they are dying off. I saw a "fresh" one that I believe was still alive a year ago. It was after I ate pumpkin seeds, which is supposed to paralyze them. So I believe it was still alive and then got stuck in waste and pulled out. It was perfectly formed like the drawing you made with the tapered head.
I just started taking DE a couple days ago and this morning I passed what looks like your pictures. I feel like I've had them for 10 years or so. So glad I found this post. I've been drinking green juice, aloe juice, taking oregano in EO form in capsules as well as a mixture of clove and some other herbs. And also getting colonics. I will add the Black-Walnut in.
I also do liver flushes. My next one is in a couple weeks. Wow. I'm still in shock.