I know most of the information we have says window period is 3months.. But my anxiety is back, I been having stomach pain and also Fungus in my ear.. Is there any possible way 5 test in 18months could be wrong? I had 3 an 3rd gen test and 1hiv pcr test and 1 ab/ag 4th gen test during those 18months.. Is there any one who has tested after the window period?