Do I have herpes? My girlfriend thinks I probably gave it to her and we are worried if she does have

hey ive recently had sex with my girlfriend a week or 2 back, and just recently shes been getting some painful red looking skin on her butt crack and she says it hurts alot. personally i havent had any symptoms at all that i know of to show i have herpes but i would appreciate it if you guys take a look and see if im missing something.

please help

guys tend to not have symptoms