Dr Bob (DA MAN),
Please help a sleepless/worried man. Haven't slept much in months. Worried about old relationship and possibility of HIV infection. I tested negative at 150 days and 165 days (Oral Quick Rapid Hv Test 1 & 2 -- FDA approved). Still so worried about the 6 month window rule (Had various symptoms post 4 - 5 months---I know, not a good indicator). Dr. Bob, I value your opinion above all others...I am not cancer patient on chemo, not immune system suppressed, did not do PEP, not IV drug user....just a guy who has no clue about old partners status....for the sake of covering all bases, let's assume high risk behavior 165 days ago.....if you were me (I know you are a lot smarter than me and a better human being), would you put this behind you and sleep well knowing you were not infected? You said you come to Vegas, I would finance a night at the crap tables for you and Steve :)
Sincerely, sick and sleepless with worry
Yes, I would consider most negative ELISA tests at 165 days negative. The CDC recommends testing out to six months for significant HIV exposures. You report "high risk behavior," but don't mention what that behavior was and you also state that you have no clue about your partner's status. Consequently it's difficult for me to give you an absolute unqualified answer regarding you negative HIV antibody test result at day 165. If you remain worried, you could test at the six-month mark to gain peace of mind. I can advise you that the vast majority of HIVers will have detectable levels of anti-HIV antibodies in their blood within four-to-six weeks after acquiring the virus. Consequently your negative test at 165 days is extremely encouraging. I see no reason for additional sleepless nights (unless you're playing craps and winning big time!).
Regarding Vegas, yes, Steve and I do enjoy our trips there and have had some fine times playing craps. If you had financed our last visit to a Vegas craps table and kept the winnings, you would have actually done quite well!
My advice is to ratchet down your anxiety levels and get some sleep! The odds are now astronomically in your favor that you did not acquire HIV from your sexcapades. (Much better odds than you'll ever find anywhere in Vegas!)
Be well. Good luck!