Every sex act has a variable degree of risk based on several factors so a constant specific percentage of risk is impossible.
Based on research, studies, and the experience of the above mentioned Drs, as well as other experts, view hiv infection through oral sex at zero to a theoretical risk.
The Drs who used to post here are both respected experts in the field of HIV have not experienced a confirmed HIV infection from oral sex.
Based on that, you had no risk for HIV.