Oral sex is a low risk exposure, but there are a few STDS that you could get such as Gono, HSV1/2, NGU (for males) and syphilis.
If you two are looking to continue your relationship the best thing to do is have an STD date in which you both get tested for STDs to learn your status.
Yeah... we both have had never had oral sex ever. First time ever
Have either of you has any kind of sex before? If not then it is no risk because neither of you would have a STD.
Oh... Ya. No sex ever before
as per Vance no worries =)