Hey I'm A Guy And I Recently Had Sex With

Hey I'm a guy and I recently had sex with a guy. It was pretty rough I was the dominant one and I had on a condom but right where the condom wasn't covered around my pelvis where I have pubic hair I got a rash like right after sex. A rash developed within minutes after sex, I was just wondering if this was simply a outbreak of male yeast infection or was it something more serious. Because doing research I discovered that it takes a longer period of time for symptoms of an STD to show up. Pleas help and Thank you in advance.