Hi, I have an itchy urethra with no discharge. The symptoms started last night before, during, and after sex with my girlfriend last night. I feel a sharp scratchy feeling when I squeeze my penis head and shaft. I felt the symptoms a bit today when I masturbated as well, but when I urinate it doesn t feel irritated, maybe a little bit. I am a male, 22, who is sexually active with my girlfried of 5 months who was tested recently for stds and all results were negative. I have also been tested for stds in the last 6 months and am in a monogamous relationship. what could this be?