ANY time you have unprotected intercourse with a person whose HIV status is not known to you, you have a risk for HIV. If a prostitute allowed you to have unprotected sex with her, that is a high-risk exposure because it means she probably allows other men to have unprotected sex with her.
Test for STDs and HIV at the appropriate time.
Just test at 4 weeks with a duo. You've posted before, so you know the risks but decided to not use the condom this time so I hope you can relax until you test.