The strains of HPV that affect the mouth most often do not give symptoms. You wouldn't see visible warts in your mouth like you would on the genitals.
Is this still from the encounter last year, or have you had other risk?
Greetings.
HPV warts vary greatly in terms of time and place of appearing so timeline is not reliable to diagnose or exclude those.
Nobody can give you the exact time you are asking for.