Welcome to the Forum. I'm sorry to hear of your condom mishap. Sadly, even when used perfectly condoms do fail about 1% of the time with rates being a little higher for anal intercourse than for vaginal intercourse. I also applaud your decision to go on and use a condom for your second exposure. If she were infected, since every exposure does not lead to transmission, using a condom was a good idea. Now let's discuss your situation.
For starters, chances are that your partner did not have HIV. While rates are a bit higher among commercial sex workers than the general public, in most countries the vast majority of CSWs do not have HIV. your partner's statement to the effect that she is not infected is likely to be true, both on statistical basis and because she said so- most people tell the truth. Furthermore, even in the unlikely situation that she had HIV, with anal intercourse the risk of infection is only 1 infection per 1-200 exposures. Nonetheless, given her occupational predisposition to infection, testing is a good idea. In general the right time to get tested after an exposure of this sort is at around 8 weeks. At that time virtually all HIV infections which had been acquired 8 weeks earlier would be detectable.
I hope this comment is helpful to you and try not to worry. The odds are very much in your favor. EWH
Dr. Hook, Thanks so much for you prompt reply to my questions. My labs today all came back negative and I will, as advised, be tested for HIV 8 weeks post. Thanks again.