I had sex the a couple of weekends ago. I'm starting to get bumps that look more like pimples. I found 1 on my arm yesterday. I popped it. Nothing came out, there was a mark afterwards but my arm cleared up and you can't tell it was there because it's completely disappeared. Then I found one earlier today on my knuckle. I popped that one too and nothing. Then just a few mins ago I felt one on the back of my thigh and same thing. It just started and I'm going to get tested when I go back to school. We're on spring break right now. I'm just freaking out right now. I'm searching my body for any more. Anybody know what it could be?