Hello, as our member states, you did not have a risk from what you describe and there is nothing to add to that. He also gave you accurate information on the 28 day period to take a Duo test. We wish you the best and are closing this discussion.
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You had no risk of HIV because you can't get HIV from oral sex or from kissing. You are so safe that you don't even need to test. So for oral, there is no window period or guidelines due to the fact that you had no risk.
This is incorrect - "I realised there is specific risk for Hiv to be transferred from her mouth."
HIV is instantly inactivated in air and also instantly in saliva which means it is effectively dead so it can't infect from oral sex. It doesn't matter if you and they were actively bleeding at the time either because the HIV is effectively dead.
Only adult risks are unprotected penetrating vaginal or anal sex or sharing needles that you inject with but you didn't do that so you had no risk. This sentence is all you need to know to protect yourself against HIV.
Even with blood, lactation cuts, rashes, burns etc air and saliva do not allow inactivated virus to infect from oral sex. The above HIV science is 40 years old and very well established so nothing you can add will make your situation a risk.