First, I'm really sorry this happened to you. If you haven't ever had any counseling for this, I'd recommend that you do.
The CBC wouldn't have shown anything, unfortunately. However, it would be extremely unlikely for you to go 10 years and have no symptoms at all.
Clinically, the chances of getting an STI from oral sex - giving and receiving - are much lower than vaginal or anal sex, so the chances that you got anything from this are quite low. Adding that it was 10 years ago and you've had no symptoms, I think you can stop worrying.
If it would help you stop worrying, why not just test? Some people feel a lot better to see it on paper. Others find it would make them too anxious. It's up to you.
I really am sorry this happened. :(
Hi and sorry about that terrible experience. giving oral sex is considered very low risk for contracting any std,s. And since you have not had any symptoms it would suggest you did not contact any. What is a cbc?
dave