Hi, I agree fully with CurfewX. Your doctor is still stuck on outdated testing times/schedules. I would ask him/her why she/he suggested it; if anything to just set your mind more at ease since you seem to have much anxiety concerning HIV. I can also assure you that as CurfewX has stated, you are at no risk from your experience as HIV is not transferred through saliva. Regards.
Total waste of a test and your anxiety. You had zero risk. No one has ever been infected by receiving oral sex, and you won't be the first.
FYI, 6 months is outdated anyway. 3 months is conclusive for any test. But for you, any test is conclusive - and negative - since you had no risk for HIV.