I found a post from a MedHelp expert doctor about this specific issue that you should read. It's specifically about receiving unprotected oral and a worry about genital warts/hpv. https://
www.medhelp.org/posts/STDs/actual-genital-warts-from-oral-sex/show/1664123 To quote Dr. H. Hunter Hansfield "while oral sex may transmit genital warts or other HPV infections, this is believed to be rare, if it occurs at all. Oral sex probably can be considered safe sex with respect to HPV." It's one of those situations where there might be 'theoretical risk' meaning it doesn't ever happen in the real world. In that attached link, Dr. HHH says he never had a single case in his practice which is very busy.
So, with that information, I'd guess this is not HPV but you are always free to see your doctor for confirmation of that.