I've been going in circles on ICU protocol for 7 months with a systemic and multiple infection of flukes, tapeworms, and maybe more.
I'm trying to switch to Mattk3's Ascaris123 protocol. Details here. It's a bear to read... I suggest reading pages 100-150, then backtracking. Took me a few reads to get the idea of things. If you scan Mattk3's more recent forum posts, you will find updated information. For instance, Levimasole turns out to be a useful adjunct.
He reports people being successful against systemic flukes by cleaning up yeast alkanalizing the body, etc, then a protocol of ALB and PRZ taken with Calcium (yogurt) and Vit D3. I believe piperazine and DEC are also helpful. And the idea is slightly lower doses of PRZ can be taken if the calcium/D3 are taken too. Pyrantel and Ivermectin are useful at times and can be used to give you a better idea of what you have (flukes, worms, etc).
The main difference between ICU and the Ascaris123 (Mattk3) protocol is in ICU's you do 2 weeks on meds with a 1 week break before repeating a course of meds. In the Ascaris123, you first prep your body, then dose the ALB/PRZ continuously at slightly lower doses and take supplements/diets to assist.
There was a recent report of someone using Triclabendazole for 5 days and repeating every few weeks. They feel like 8 rounds have pretty much eradicated the flukes Details here.
If it were me, I would try the Ivermectin/Pyrantel test described in Ascaris123 to make sure all you have is flukes. If it's a simple and relatively new infection, try for the triclabendazole only (it's hard to obtain). Otherwise, try the Ascaris123 (Mattk3) approach. He claims that people are reporting success (eradicating flukes) with like 60 days of continuous treatment of ALB/PRZ/D3/Calcium. I'll note that I had no success with anything until I first did some cleansing diet and got candida/gut fungus under control; in short, that means you need to get your bowels moving regularly first.
Be prepared to repeat whatever treatment you do until there's no sign of flukes for several months, and perhaps do a maintenance program after that. Be prepared to be working on this for a while. I did 8 rounds of ICU-like protocols over 6 months and went in circles. When I started, I thought it would just be a couple of rounds.
You'll need to pay attention to what works for you. By accident, I discovered that taking the 3 doses of PRZ on a 2 hour interval instead of a 6 hour interval, worked better for me. It took me a while to figure out that pain around my liver was not ALB toxicity, but rather parasites. Figured that out when the pain developed a few weeks after I stopped taking meds.
Also, be mindful of doing something that will merely irritate the flukes and drive them deeper into your system/organs. For instance, I tried a low dose of PRZ/ALB on a 3pm9pm3am9am schedule as described by Mattk3, but without the necessary D3 and calcium to make the PRZ more effective... and I could feel the flukes going deeper into my liver. Anything (herbs/drugs) that does not work systemically could do this. I took fluconazole by itself before I understood what was going on, and it drove something into my chest.
It would be worth searching Curezone for flukes to get an idea of what has been working for people.
This website has some useful information, but at 12-18 months, their protocol seems less efficient than Ascaris123.
I don't know exactly why the doctor wouldn't see it. One thing is I suspect the colon cleansing you do before the colonoscopy flushes out the obvious signs such as tapeworms in your gut. Many of the parasite eggs are tiny and invisible. Not sure how visible a tapeworm head attached to the intestine is. I believe flukes tend to live in other areas.
The other problem is that doctors in the US tend to think of parasites as a 3rd world problem. You don't find what you don't look for or know how to look for.
The funny thing is that we worm our pets and livestock regularly in the US and somehow assume that people don't need to do the same.
The bottom line on all that, however, is you are the master of your body and know it better than anyone else. A single dose of Ivermectin or Pyrantel will give you good idea... as well as you will know when you feel good. Based on your photos, flukes seems likely. You could try to confirm with an Elisa test, but it's probably easier and cheaper to try a treatment.
As far as sources, it's wise not to post them on the forum because authorities have been cracking down.
I am currently in Thailand and not up on the current sources in the US. Most people in the US seem to use online veterinarty sources; many of the animal meds are the same as for humans... not always the case, but I've heard of people successfully using albendazole for cattle, ivermectin and pyrantel for horses, praziquantel and pyrantel for aquarium use. If you live in a rural area, you may be able to find some of these things locally at a feed/aquarium/pet store. You do need to read the labels carefully to make sure it's the correct active ingredient and there are no additives, and it's wise to use only what people have reported using successfully. In the past, I've used what I mention above.
These links will give you some ideas.
For triclabendazole, read the thread I posted above carefully. I believe it contains useful information.
Here's a simple version of Mattk3's fluke recommendation... He doesn't mention the other supplements he talks about in Ascaris123... which you should read to be aware of the dangers and side effects... in that document, he recommends starting on the low side with D3 and gradually trying higher doses. If you have flukes in your brain, the higher doses of D3 may create horrid die-off symptoms. Some of the supplements are said to help moderate those side effects. Since I'm having trouble finding supplements where I'm located, I'm gonna try the D3/Calcium/PRZ/ALB without much extra.