I started with a fever of 101 Thursday evening, took some Tylenol and it went away but then I broke out in a sweat. I mean covered in sweat. A couple hours later I had cold chills so bad I was shaking. Then the process repeated itself. I went to ER. They checked me for the flu (negative) and my urine (negative). My body hurts mainly legs, feet, knees.
Hereafter reading of your query this fever with chills and rigor (shaking) may be due to these possibilities, these include:1 Malaria, chills, fever and rigor are the characteristic feature of malaria. Diagnosis can be confirmed by peripheral blood film and rapid card test .2 Acute septic pharyngitis (including tonsillitis) is another reason of such type of fever .3 Dengue, is another reason of such symptoms because mainly along chills, rigor there is pain in legs, body feet and knees also present. However, there are so many other reasons of such fever like chicungunea (serology test) but I recommend you consult a physician and get his opinion, if fever persists after 2-3 days (till take Tylenol as sweating was due to fever and Tylenol). Hope this will help you.