Thanks to both of you for your help.
In desperation I contacted my local county health lab. I took in the mason jar full. Of course, the lab report came back as no flukes, no worms but they didn't identify what it is.
I keep doing challenge tests about every three months with pyrantal paomate, mebendazole and frozen cod liver oil capsules. I have gotten some very minor amounts of small worms previously and figured that the mebendazole was killing them. This time I was really surprised. I too am not sure they are flukes. They are unlike anything I have passed before. I am positive they are parasites of some kind. I passed them for a few days. It seemed as though I emptied a nest. One large one and multiple small ones.
I will try Parawellness. Thanks again.