If you are doing a Liver Flush - you are going to mainly see stuff that was in your liver - not alot of stuff that was in the intestines. I find this true especially towards the end.
Many thing that are parasites, may be in different stages of development. They don't necessarily look like the "classic" adult phase. parasites are complex & have many phases of development.
If you have a tapeworm, you may pass pieces or segments of the Tapeworm - not the whole thing. You also can pass eggs or lots of stuff that may look like an alien only in miniature.
I didn't see anything weird until my 3rd liver flush. Best to be careful. It's not a bad thing to take some Black-Walnut hull, Wormwood , & cloves combination caps for a couple of weeks. After that - you will be able to tell if you have any parasites or not.
If you do, it's likely you will see them in the toilet or have grumbling in your intestinal area, nausea, diarrhea, etc. You also can get flu-like symptoms from the die-off. parasites can also be in the lungs or blood...