I have had a low grade fever of between 99.6-101.9 that I get in the afternoons and evenings. I don t get it all the time, it will last for a couple of weeks and I might not have another for months. This has been going on for 4 years and I have seen numerous doctors and had many tests, however no one can come up with an answer. During these fevers, I can feel them when they start, I get cold and start having chills, I am extremely tired, and my body aches, almost like the flu. Recent blood work has shown me to have pre diabetes, my A1C was 5.5 in August last year and 6.0 a week ago. Could this be related? Could I have some type of autoimmune disease? I also have 10 benign cysts on my thyroid that swell once or twice a year but all of the extensive thyroid testing has come back normal. Please give me your opinion of what to look for next!