Sorry my comments weren't very helpful. You have noticed a pattern to the diarrhea so it may help you to write down everything you do and eat starting from the time your get up until the diarrhea occurs. If you drank water or bathed consider chlorine sensitivity and pollutants in water. Putting in a water filter may help. Eliminate the foods you ate then after a while add them back one by one.
There have been several people on the various parasite Forums who I think have similar problems, two of them mentioned Charcot Leyden Crystals. Compare problems with Shroom.
Protozoan parasites and yeasts are protected by biofilm. Sometimes the biofilm needs to be digested away so that the organisms respond to treatment.
Both Dr. Bob Schultze and Hulda Clark may have some programs for intestinal problems that may be helpful.