Hi Dr. I am male. I am unprotected vaginal sex single exposure with a girl. 9 months later found she is hiv positive. My question:- 1) Everywhere is saying after a certain window period time (3 months) after getting negative is conclusive & even after (6 months) confirmation is definitely negative. But why are all these other people saying you can go years without showing positive & that's really freaking me out big time. Is it true that it takes your to come up positive or does it only take 6 months to know 100%. What's true? 2) One doctor say in medical no test 100%. 3) I am still 17 months post exposure 4th generation test ,hiv rna pcr qualitative all negative. 4) I am 100% negative. 5) My result is change in future? 6) What is 100% windowperiod. One doctor say Hiv many years be come positive what is the truth. I cry and pray to God. Ive ruined my life. I have not tested 18 months post exposure all negative.