Concerned

[pasfren]

I'm a male who recently had a sexual encounter with 2 females(threesome). I'm pretty much in control of the situation every time I'm in a sexual envirorment but this particular time something happened that got me freaking out BIG TIME.
I performed oral sex on both of them and one of them performed oral sex on me. At one point I was laying on my back with one of the girls sitting on my face and I was performing oral sex on her while the other girl was performing oral sex on me. The girl sitting on my face was blocking my sight so I couldn't see what the other one was doing but at one point I felt when she sat on my penis while unprotected. My penis was inside of her for about a minute, maybe a little more(can't exactly remember). When I realized we were having unprotected sex I stopped and put a condom on before we continued. We kept on having protected sex, I even replaced the condom to penetrate the other girl. After I ejaculated I went to the bathroom and washed my penis(don't know if that matters).
What got me very SCARED is that someone told me that the girl I had the unprotected sex with had recently moved back to her native country after finding out she was infected with HIV.
My question is:

-What are the chances of me getting infected after a single unprotected encounter and for that short of a time with someone believed to be infected?

I plan on getting tested tomorrow, after 6 weeks of the exposure.

-Is the test after 6 weeks accurate enough? Will I have to repeat it after 3 month?
-Can someone explain to me the real chances of transmission in my case?
Thanks in advance!  

[Vance2335]

Post in the HIV community.

mboy14 please direct people who have questions about HIV and Herpes to those communities.

[mboy14]

6 weeks is very accurate but it is not conclusive. You should post this in the HIV Prevention forum, since this is the STD forum, but 6 weeks is very accurate. If you are negative at 6 weeks, you can rest easy, but should repeat the test at 3 months. You were at risk for other STDs too like gonorrhea, chlamydia, trichomonas, and syphilis. I don't know exactly the real chances of transmission, but HIV is extremely hard to transmit and since you were there for a minute, our chances are low but still there. I hope this helps.