Negative Results at 40 days -- More testing neeed?

Back at the beginning of December, I took the labcorp standard anti-body test and DNA PCR test exactly 40 days post exposure.  Both tests were negative.  My exposure was a one time episode of unprotected vaginal sex with a friend of mine. She says she is negative, but I was still worried anyway.

My question is at 40 days (close enough to 6 weeks) are these reliable enough to conclude HIV negative or do I need further testing?  The DNA PCR test (found here at http://www.areuatrisk.com)  says accurate after 28 days on the web.  I took both tests because Labcorp (the company doing the testing) said if I did both of these at 40 days and both were negative I would NOT need further testing.  

I just want to move with this situation - I'm going to be buying my first home very soon and would like to be at least somewhat worry free.  Also, I had some Pressure (wouldn't call it a pain) in my groin area.  I don't seem to feel/see any swollen lymph nodes - and this just kinda started (at 60 days out).  

I would have ask Doc HHH but the other forum always has "too many questions for the day" message.

Thanks for the help

[Torontoguy28]

You don't need another test. The chances of having HIV were miniscule to begin with and at 40 days, I am not sure of the exact numbers, but the test would be over 95% accurate for sure. Your chances of having HIV are 1 in millions, probably higher than that.

[Firstandlasttime]

You can search the forum for time to test. Lots of info there with people asking basically the same question.

[Anxious and Worried]

DNA PCR is conclusive after 28 days.