Ok if not street hooker, the chance for her to be hiv infected is smaller. But if unprotected vaginal sex eventhough small chance, still a chance. So please test at the given weeks. For HIV the odds are in your favour. But again, please test.
Half year was 20years ago. With 4th gen closer to 6 weeks. Some countries use 12 weeks as definitive.
Vaginal only is not a huge risk but still a risk. (0,10% per act approx uf she was infected) where did this happen? Was it a street hooker?
Test for chlamydia and gonno at 2-3weeks and hiv (4th gen) an syphilis at around 6 weeks. For syphilis definitive negative 12weeks
You don't remember if you used a condom or not? Well firstly a handjob is no risk. If you didn't use a condom you had a risk and require testing.