So about 6 weeks ago I had brief sexual contact with a stripper. Contact was short but I rubbed my bare penis on bare vagina. I posted a few months ago stating what happened and was told not to worry since I had no symptoms. However after about 4 weeks I got a pimple on my penis. It was completely painless and just seemed like a normal pimple. But sorta freaking out again. Could this be herpes. Should I get te st ed. Will a blood test be accurate now or even necessary? Please help.