Follow up I reread the whole thread

More or less Boldy was saying the same thing, as I suggested, in her first answer.

Stop the parasite, do liverflush and bowelcleanse (except for 2 days).

Do the flush after 2-3 weeks again. Just keep cleaning and after a month try the parasite again.

As far as your fear, I would read the liverflushforum and you never read about stuck stones and if people think they do, they do the flush right away again.
When people talk about stones they are not talking about gravel like your backyard, but soft green peasize cholesterol stones, also sesame size sludge, like a toilet with sand.
In my case things were backwards I had a calcified 2.8cm gallstone in the neck of the gallbladder, after flushing it got dislodge and is now freefloating and I don't have any symptoms. You can live with a gallstone if you take care of things.

The other thing I would do drink a glass with 1-3 tsp Epsom Salts it will relax the ducts in the liver and it will take away pain, you can repeat that. A lot of ES will give you the runs so stay near a bathroom.