Two days ago I had unprotected sex with a woman I met at a bar. It was a drunken heat of the moment type thing that I now regret. Anyway, I developed flu like symptoms the very next day (sore throat, fever, headache, muscle pain, etc) which have now dissipated as of this morning. This morning however I did notice a single, painless red bump on the bottom shaft of my penis. Firm to the touch. I don't know if this bump was there while I was feeling sick. I plan on getting blood tested once the incubation period is over but in the meantime I'd like to know if this sounds anything like an early onset of herpes?