All in all, you describe a low risk situation for all STDs, including HIV. Genital apposition/contact, without penetration, isn't risk free but all STDs are very rare after such exposures. It isn't contact with genital fluids per se that creates most risk:  the main STD bacteria and viruses evolved to require much more, such as exposure of certain cells that exist only inside the genital tract; vigorous rubbing to massage organisms into the tissues; and/or exposure to large amounts of infected secretions (like with ejaculation in the vagina). In addition, oral sex in general is low risk, and all STDs are rare following cunnilingus. Yet another reason for this is that oral STDs are uncommon -- far less common than genital infections especially.

That said, it seems your partner has been at risk, and I understand why you might not be confident in his testing history. 

Going to your core question, whether or not you "should" get STD screening:  I would say yes. Not because the risk is high; if you are tested, I would anticipate all results to be negative. In other words, from a medical/risk perspective, testing is optional and not required. However, many people sufficiently worried to come to this forum or otherwise seek such advice are more likely to be reassured by negative test results than by professional advice, no matter how expert it may be. (We don't take it personally!)

If you decide to be tested, the main tests to consider are a urine specimen (or vaginal swab) for gonorrhea and chlamydia; and blood tests for HIV and syphilis. Ideally, evaluation is done during a comprehensive pelvic exam; the physician can gain information clues by visual exam, evaluation of any vaginal discharge or fluid, etc. But lab testing alone, as just suggested, should be fine assuming you have no symptoms like vaginal discharge or odor, vulvar irritation, etc. Be careful if you choose a lab's "comprehensive" STD panel or some such combination of tests:  although seemingly a good deal, they often include unnecessary or misleading tests. In absence of symptoms I would suggest avoiding herpes testing for example; and for sure no tests for certain bacteria often included but almost never requiring treatment even if positive (like Mycoplasma hominis or Ureaplasma, for example). And your risk is zero for hepatitis B and C, so there is no point in those tests.

I hope this information is helpful. I'll be happy to comment on your test results if you go ahead with testing. In the meantime, let me know if anything isn't clear.

HHH, MD

2) By "massage" I mean vigorous rubbing of genitals together. It usually is necessary for transmission of all three infections just discussed, and it sounds like that didn't happen.

3) For gonorrhea/chlamydia, 3-4 days after his last sexual contact. For syphilis and HIV, 6 weeks. (There is no need for any others.)

Glad to hear you were immunized against HPV before sexually active. You are 100% protected from the HPV types that cause almost all warts and cancer. You can consider yourself free of risk entirely (but still should follow standard Pap smear guidelines as the years go by). This encounter has not raised your risk of HPV -- that's why you were vaccinated!

Testing for syphilis is the only practical option. As I said above, the herpes blood tests are too unreliable (and the chances of infection too low) to be worthwhile, and there is no test for recently acquired HPV and you're not at risk anyway. Syphilis also is exceedingly unlikely, but it's very dangerous and testing is accurate and easy, so it would be reasonable to test. Or for your partner to be tested for it.

That completes the two follow-up exchanges included with each question and so ends this thread. I hope the discussion has been helpful Best wishes and stay safe. And try not to worry about these events. They're a big nothing burger in terms of STI risk.