Well, depending on what "virgin" means here, and "limited experience", it's kind of hard to quantify your risk. If she had no experience, including oral sex, then your only risk would have been genital herpes type 1 if she had oral hsv1.
If you already have oral hsv1, you can't get it again genitally, so that would eliminate that as a risk. You can have oral hsv1 even if you don't remember ever getting symptoms - most people never get any symptoms.
If she's given oral sex before, there is a risk for gonorrhea, chlamydia, NGU and syphilis. Syphilis is uncommon in most developed countries, and the chances of others is much lower with oral sex.
The blood under the skin doesn't concern me as far as increasing your risk - your chances sound really low given her lack of experience.