Thank you for your inquiry. From what we gather from the question, you were asking about HIV transmission through receiving oral sex with a condom on. From the information given, this scenario is determined to be Negligible Risk (There is no evidence or no documented cases of transmission. However, there is a theoretical possibility of transmission under certain extenuating circumstances).
The scenario mentioned above does not meet the three components of the transmission equation. HIV is not transmitted through saliva, therefore receiving oral sex does not provide direct access of an HIV-containing fluid to the bloodstream. If the person performing the oral sex had the presence of oral ulcers or bleeding gums it would increase the risk of transmission, but since you were responsible and used a condom I think that there is no risk of that.
I don't think that your blood would have been tested for the presence of HIV unless you asked or it was disclosed to you beforehand. If it is something that you are anxious and unsure about I would recommend following up with your doctor.
Recommendation: There are no evidence or no documented cases of transmission. Refer to a healthcare professional for more personalized answers
AIDS Vancouver Helpline/Online, Rashell
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