Is it possible to test negative for HIV if you are in late stage HIV/aids? I have several symptoms (Headache. weakness in arms and legs, nausea,no appetite, etc), an abnormal MRI, elevated protein in my CSF and Issues with my vision. Lyme and MS tests were both negative. My Neuro is sending me to another Neuro for review. I ve been feeling very sick for several months with no DX. So frustrated. Please help!