11 months ago I had a one night stand with a girl of questionable STD status, but I used a condom. I had no symptoms that suggested a STD for 9 months. On the 9th month after the episode I got a small, painless, solid, red bump the size of a pimple or an ingrown hair on the very bottom of my shaft. There was a hair growing out of it, so I plucked the hair and didn't think much of it. About a month and a half later the exact same bump came up in the exact same spot. It never has developed into anything other than a little red bump. No fluid, no blister, no scap, just a single red bump. I know this isn't common herpes symptoms but it concerns me that it came up in the exact same spot. Could this be herpes?