I went through a period of fevers like you describe. Low grade usually no higher than 100, but just enough to make you feel bad. I took tylenol, and was told not to worry, be happy.
Darrell

Stage 3, T3,N1,M0,SCC, Base of Tongue. No Surgery, Radiationx39, Chemo, Taxol & Carboplatin Weekly 8 Treatments 2004. Age 60. Recurrence 2/06, SCC, Chest & Neck (Sub clavean), Remission 8/06. Recurrence SCC 12/10/06 Chest.