I have been sick for about 2 months now and doesnt seem that i will recover soon. It all started with flu ( fever and running nose) then the flu vanished. However till now, i am still experiencing headache, pain behind the eyes, diziness, random muscles pain, bones pain, joint pain. Note that i have had several sexual intercourses with sex workers. For that i took std tests at week 2 and week 5 after my last possible infection, and the results were negative. hiv test was by eclia e411. Are my tests considered conclusive ? I have had different tests also such as c-reactive protein (serum), uric acid (serum), R A factor Titre, erythrocyte sedimentation rate and others, all the results were normal, except for vitamin D. What could be the reasons of my sickness ? I also took neck and chest x-ray and nothing abnormal was shown. Please help .