I had unprotected sex about 10 days ago, last night i started to get a burning pain on the side of my penis, but no sores or bumps. I'm also on ciprofloxacin because a few days after the sexual encounter i had a little burning when i peed and had to pee frequently. Took an std test for all the main std's including herpies but still waiting on the results. what could this be? any info would be great.