The below link is a good basic guide into fungal pathogens with associated symptoms. The below is an excerpt that should be considered by anyone who is looking into a problem. The most important thing is to identify what the problem is so that it can be dealt with effectively.
"It should be no surprise, then, that fungal and yeast infections are frequently associated with "mysterious" illnesses such as Chronic Fatigue Syndrome and arthritis. The fungus is injecting its host (you) with toxins to dissolve and digest you. Even if the infection is localized, the toxic enzymes are transported by the blood stream throughout the body."