I had an unprotected sex with a girl in June this year (about 5 months ago). Some few days after, I started feeling some discomfort in my penis - no discharge of any kind though. About two weeks later, I went for an urinary lab. test and everything came out fine/normal. The discomfort continued so I saw a doctor who put me on a course of antibiotics. After the course, the discomfort became intermittent - coming and going. I saw the doctor again and I was advised to take a hepatitis b test which came out normal. The doctor then put me on another course of some tablets. After this course, the discomfort cleared but now, it (discomfort) has returned. The 'discomfort' feels like a sort of 'pain' at the tip of my penis but no pain when urinating. What could this be?