probability of HIV transmission

i am 19.i had unprotacted vaginal sex with a sex worker.suppose that the girl was infected.how much probability is there that i also infected myself by having vaginal sex only once.i am sure that there was no cut or sore on my penis

[LIZZIE LOU]

it has been quoted that a one time exposure with someone who is hiv positive is around 1 in 2,000.  with that being said...IT CAN HAPPEN on the first time.

a test at 6-8 weeks post exposure will give you a good indication of your status, but follow up at 3 months for a conclusive result.