A month ago I had a sex with a girl with no previous history background. It was only protected oral. After three days my problem starts. First some small itchy red rashes (say 10 on each leg) on thighs and then itchy scrotum and groin area at night where the place is hot. On pubic area it was also some red spots as well. Baby powder makes it heal. But it does not go away completely. just wondering if I should go for STD test?I have no other symptom other than itchy groin area. the rashes were still there.