hi everyone, i am a chinese man 24 years, on Nov second, i had a dangerous sex with a women, and now i have test for 45days, it's negative. tomorrow i will test for 7 week(49 days), i just want to know how long about the windows, i really want to back to normal life after i test 8 week. do i need to test 12 week? thank you all, and the reagent is 3th gen Elisa. after 8 week test, is there any possible turn to positive?