Partial control of brain on hormonal system

Consider that glucose increase in the blood signals the pancreas to release insulin. In a Pavlovian like fashion, insulin is released, even when glucose is not present, via the PNS. That is the brain is controlling hormonal output. Now consider that interleukin is released by the immune system to among other organs also the brain. It tells the brain to increase fever, makes sleepy, basically feel awful. This is presumably done to tell one not to expend energy so that the immune system can diverge all possible energy to fighting the pathogen. What if one, due to psychological reasons, felt awful via biofeedback methods and increased the immune system. The immune system starts kicking out interleukin and one becomes "sick". What would be the long term results? Hyperalgesia, fibromyalgia, degenerative joints, hyper immunity w/c can lead to allergies?