i had unprotected sex just over a week ago, initially i got tingling feeling in the tip of my penis 3 days after exposure. now (9 days) i have a small grey patch visible when i spread open my urethra and the penis is causing me Sharpe pain (intermittent), no real pain when urinating however i do feel like i need to go more often, no flu symptoms or other aches in body. no obvious warts on the penis it self. loss of appetite and tiredness could be due to anxiety. what could this be? i have pictures if there is anyway of me posting them.