I want to know the conclusive exact window period for hiv wherein from the past year I have done PCR DNA, RNA. All are hiv negative. But I encountered all the symptoms as per the information from the Internet and i suffered for 3 months. I know I am infected but lab results are unable to detect the infection. Can any professional clear my doubts because some of the doctors have already told there is no specific window period for detecting hiv, once full body immune system is collapsed then it will be detected.