It is possible that some STI can pass when receiving oral sex. Have a look at our “Know your chances” web page, it provides information on your chances of getting an STI from receiving oral sex.
Given that your exposure to her mouth was limited (it sounds like the condom was on for the majority of the time for oral sex) your chance of having something pass would be lower. It’s difficult to know the exact risk as it really depends if they had an STI in their mouth.
The risk of getting genital herpes from oral sex, which is mainly caused by the herpes simplex virus (HSV) type 1, also depends on your personal situation. If you already have cold sores (HSV-1 on the mouth) it is difficult to get the same type of HSV in a different part of the body. This means if you have cold sores it is much harder for someone to pass HSV-1 to your genitals.
If someone gets a new HSV infection symptoms usually show up between 2-21 days with an average of 6 days. The only problem is many people can get HSV and not show any symptoms. Have a look at our HSV page for more information.
There would be no HIV risk when sucking the breast.
It could be possible if the person had genital herpes and was rubbing against your thigh that it could pass to you but I think the risk would be low as the skin on the thigh is thick and the herpes virus would have a tough time getting through this layer of skin.
If you wanted to be on the safe side you could always go for an STI test for peace of mind. Most gonorrhea and chlamydia would show up in a urine test by 2 weeks and most syphilis would show up in a blood test by 6 weeks. As you are concerned about HSV you could also talk to the health professional you see about this and they would be able to give you additional information based on your personal situation.
Please leave a comment to let us know if this answers your question or if you need more information.
For other readers, please feel free to leave a comment, or let us know if this was helpful.