Oral sex is not considered a risk for HIV. Saliva contains digestive enzymes that are a hostile environment for the virus and therefore it renders it inactive and unable to infect.
But also, you can't get infected by your own blood. You said the blood you found was yours and therefore there's no risk. But even if it was his, it wouldn't matter. HIV is a virus that can only infect while inside the body because the outer shell of the virus starts breaking down immediately upon contact with air.