Obviously the HIV risk here is zero for all practical purposes. You were reassured by your partner that he doesn't have HIV, and really could not have it, unless he is lying through is teeth about his testing history. And you had expousres that carry no measruable risk of HIV transmission; certainly masturbation carries no risk at all, and people debate about whether receiving oral sex ever transmits HIV. If it does, the average risk has been calculate at 1 in 20,000, which is equivalent to a BJ once a day by a known-infected partner for 50+ years before transmission occurs. And on top of that, you had a negative test more than a month later; and nobody ever gets HIV because of inappropriate needle use, at least not in the US or other industrialized countries.
Could you possibly be infected despite all this? Sure. Could you get hit by a meteorite?
No follow-up comments or questions, please. There is no information you can possibly provide that would change my opinion or advice. You don't have it. Move on.
HHH, MD
hadams, you don't have HIV due to this encounter. He had the condom on when he tried. Relax and try to calm down, you cannot get HIV from oral or masturbation.
From the risk you described oral only (no penetration, with condom, is no risk), you had a low/no risk. you have taken all the necessary precautions. If you are going to be worried over thses type of events maybe you should reevaluate your lifestyle/protection practices. If a blow job without a condom causes you fear, than you need to wear a condom while getting a blow job. No need for this type of stress in your life.