Sexually Transmitted Infection.

I haven't had sex in a couple years, but early May I fooled around with this guy. There wasn't penitration, but his penis rubbed me. 
 Well today I had an itch, there is this bump on my private area. There is only one. Could it be gential warts? No he didn't have a condum, and he hasn't had sex in a year. I have a check up the 15th of this month. I just want opinions.