 [ Symptoms ] i get sharp headaches spells of light headedness and dizziness fevers on and off [ Disease ] hi in my opinion you need to do urine test stool test tsh t4 cbc esr your symptoms do not add up it seems like you have more than one problem only problem i can think of than can explain your cocktail of symptoms is thyroiditis we will aslo use the tests to check for viral or h pyloi infection good luck