Condom Broke by accident....

A girl got an HIV/AIDS testing on 26th October 2010 and I got testing on the 06th October 2010. Both of our results came back NEGATIVE.

On 27th October 2010 she told me she had UNprotected sex with her boyfriend who is Uncircumcised.

Between the month of August and September 2010 her boyfriend under went 3 surgeries, which required his blood to be taken and tested for HIV/AIDS and other STD's, all of his test results came back NEGATIVE.

On 30th October 2010, 3 days later after she had Unprotected sex with her Uncircumcised boyfriend, for some strange and weird reason, I accidentally push my penis in her anus (I was wearing a condom). My penis was insert in once, right away I ejaculated andmy penis was out of her anus (In total I was in her anus for about 25-30 seconds) and when I partially finish I looked down and notice my condom empty, then she took her hand and wiped between her legs and it was some of my semen.

Apparently, the condom broke; When I lifted up my penis and turned it slightly, I saw the condom broke with a hole and semen is still around the head of my penis.

I am Circumcised and my question is: Can I get HIV/AIDS from that accident which happened, where the condom actually broke.

I don't know if her boyfriend had sex with another girl in that time space but I plan to wait on the Window Period of 3 months to get all STD's testing.

Should I be highly concerned