Hm how are you sure the strings are fungal? Have you tried sending in a sample to metametrix's GI effects test when you are passing it? If it comes out as UnIdentified fungus it could be dead yeast. I believe that is what it was for me anyway.
Have you tried chelation?
Also, I feel like sometimes, you have to start from the very beginning almost and see if you missed anything. Like take 3 stool tests from different labs with a clean slate, see what it is exactly that remains a problem in the gut. Could shed new light on some stuff.
What kind of diet are you on specifically? For me as well, cured would be first off eating what I can. and secondly id be thankful if i can run 50 feet without collapsing. Hard to believe I was in perfect and top athletic shape just 1.5 years ago.. used to bench 300lbs weighing at 165lbs, drove fast, partied a good amount, studied my ass off and lived the fast life and NEVER could've even imagined something like this to occur...
But it will be resolved. I believe it. dont give up