Hi... I'm a 36yo male, average build and health. I recently had unprotected sex with a long-time friend of mine about 3 days ago. Since then, I've had a mild itching sensation just inside the urethra of my penis, and a mild tingling sensation. in the same area (around the head of the penis, but again, inside it). There is no burning when urinating but the tingling sensation is more intense. I'm also having the urge to urinate frequently. I'm curious if this is evidence of a yeast infection, UTI, or *gulp* an STD. I intend to see a doctor about if it doesn't resolve... just wondering which route should i go.