Reading your symptoms list is like reading about myself, but I have been dealing with this for 20 years with no help. All parasite tests and Candida come back normal, despite having a positive spit town several years ago for Roundworm. Stool tests normal. Have been diagnosed with several things, but no treatment ever helps and I feel like I am getting worse, I am planning on seeing an integrative gastroenterologist who also practices holistically and am going to ask him about Protozoa. BTW, unless you use a specialized lab like Igenex, most Lyme tests will come back negative, if you have it. Rickettsia is a common false negative thing as well and from I am being told, rampant in such places. My suggestion to is to go to Facebook and join the Spooky2 Rife forum. I just got mine and am still learning how to use it. A lot of people like us are being cured and it has a scan that can tell you which frequencies you need to get well.