Welcome to HCM.
Since all the tests that you did have come out Negative, forget about HIV
In all probability, you must have dreamed of oral sex
. Now you are possessed with fear obsession about it. This will ruin your life and you will not be able to concentrate in whatever profession you are in. Consult a psychiatrist
and let him evaluate your concern and if necessary treat you accordingly.
Wishing you all the best.