I am a 24-year-old female. I have done my blood work and the neutrophil count is very low 0.6 from normal in a matter of weeks and I do not understand why. Other symptoms, I am having are low-grade fever, joint pain (knees, hips, and shoulders), extreme fatigue, and spasms in my leg. All of these symptoms come and go, and not always all together. But I have periods where I feel good and manage to work out and do things I usually do and other periods where I am so tired and cannot do anything.