The same symptoms keep reoccurring any ideas what it could be

Patient: Hello, for the past two weeks I’ve been getting a reocuring fever every morning and night. I am not sick like I have no cold or flu symptoms. What comes along with the fever is a bad headache along with my body just feeling all achy. It seems like no over the counter medications work. Its really starting to annoy me I can’t stand feeling this way day in and out. Any ideas what could be wrong? Thanks for your time.