Expert Q & A Answers About genital pimples

Is this a pimple or do I have herpes?

Can you get a pimple on your outer vaginal area? My boyfriend and I have been having unprotected sex for more than three years, but I get tested every year and I haven’t tested positive for anything so far. Recently, when he inserted his penis, I felt some discomfort...not inside, but when his penis hit the outside. Then I found this bump, very sore to the touch and looks like a pimple. Once I popped it, it didn’t hurt as much and it’s slowly going away. Should I be concerned about herpes?