So i've been running a fever for 2 weeks and every test has came back negative i'm on doctor care but i don't know but i was 102 and now i'm 98

Mild virus: The most common cause of fever without an obvious cause is a self limited viral infection. Such fevers usually resolve within 2-3 weeks without treatment. Fever lasting longer than 3 weeks without an obvious cause is termed a fever of unknown origin(FUO). There are numerous possible causes of FUO> see: http://bit.ly/1xlhiYT

Fever unkown origin: This would be classified a fever of unknown origin and this can be hundreds of things. Some of the top reasons are the following: abdominal or pelvic abscess, dental abscess, endocarditis, sinusitis, TB, UTI, CMV,EB virus, colon CA, luekemia, lymphoma, drugs, clot, thyroid its, RA, Lupus, Crohns,