Thank you guys for your responses. This eases my mind a lot.
I agree with Dadz, do not overreact. A condom break is a risk but so very tiny. It's less than 1 percent chance. It sounds like the woman is very interested in her health and that of her clients. She was prepared, calm and articulated that she's tested negative. I would not take PEP for this also as stated as the risk is too low to warrant it. You have 72 hours from the event to decide. I'd simply test at 28 days with a 4th generation DUO and expect it to be negative.
Don't over react,
Your chances of having HIV on the back of this is truly miniscule.
here is why.
Firstly I don't know where you live but the chance any woman has untreated, unrecognized HIV is incredibly low, any yes even CSW (they actually are pretty good at keeping themselves and clients safe, despite the media pile on to the contrary)
We can also use the even to further lower the risk she used a condom with you which shows maturity, she had cleaning materials (which probably didn't help but shows she is careful) and she says she test daily and is negative, as a rule most people are honest with this. We can safety assume she is negative and as such cant transmit HIV to you.
I put it at way LESS THAN 1% chance you CSW has a transmittable HIV infection at time of condom break.
If she happened to have a HIV infection studies have shown that transmission rate vagina to penis in unprotected sex is around 1 in 1200.
Honestly i calculate your chances of HIV is no more than 1 in a million. I cant say zero risk, sorry, but I'm happy saying if i was you based on this encounter. I would not worry and move on, i possibly wouldn't even test.
this CSW seems very sensible, So why don't you ask for a recent test of her to try put your mind at ease? Or even ask her to test again and share results. She may be as worried as you are.
If you want to test the best test for you is a 4th gen lab test you can get 97-98% conclusive results at 4 week which would make your 1 in a million chance even lower, you can get 100% conclusive results at 6 week.
You are still (just) in a timescale when PEP is a possibility but i would advise against this. Your risk is too low to consider it. and it will mess with your test results if you choose to test.