Hello, the chance is low from what you describe. You can wait about 7 to 15 days, for any sign of legions. As far as HPV strain infection with no symptoms, well that's another story, I think you should be fine. Just be careful out there.
Performing unprotected oral sex in what you describe within the community of Men who has sex with men, know that HPV prevalence is higher. Overall I move on if in 15 days you see no legions/ulceration/warts in your mouth.