I’ve had a low grade fever for over 6 months. I’ve been to my doctor numerous times. He has ran all kinds of test on me and nothing yet. I’m a 30 year old female. Every time I have a CBC done my wbc is always slightly elevated. I have constant “body aches and fatigue”. I don’t know what to do at this point. I’ve also went to the ER and they look at me crazy when I say I’ve had a low-grade fever range 99.5-100.5. I’m praying someone can guide me in the right direction of what is going on.Negative for headache, diarrhea, blurred vision. I’ve had some nausea starting now for the last month. What causes a low grade fever for so long?