Addtional information from questioner:
When she gave me oral sex, I don’t wear a condom. So I know my penis exposed to her mouth straightly. But when we did the vaginal sex I wear the condom. I am very afraid because I think it was a high-risk sexual behaviour. I will never do it again.
Hi, dont be overly concerned about this as using the condom with the vaginal sex would have protected you from the more common stds like gono and chlamydia. But there would be a slight risk for non std infection from her mouth bacteria. If you dont have any urethra irritations or white puss discharge 5 to 7 days after the affair you can pretty much rule that out. There would be a slight risk with the protected condom for syphilis and herpes but if none of your genital area made rubbing contact with hers then you can rule them out also. herpes would also be a risk with the unprotected oral but its so low of a risk im reluctant to even mention it. Without symptoms of genital sores or penis issues, not testing would be recommended unless you have a long term partner.