Hello. An embarrassing problem. I will provide as much detail as possible:

Since Monday (Nov 25th) I have been experiencing a painful, burning sensation when I urinate.

The pain increased slightly on Tuesday, and has stayed at about the same level since. Fearing a urinary infection or an STD, I went to a clinic and had a battery of tests for infections and STDs (chlamydia, Gonorrhea). All tests came back negative.

But the burning sensation persists. I am looking for answers about what else it could be?

I am sexually active - I had moderately active sex with my girlfriend two days before the pain started. During sex, she gave me hard oral sex and I remember it hurting. Also, I did feel a tiny click from my penis at one point. At the time I was barely aware of it, and the day after felt fine. Also, there is nothing visible - no evidence of bruising, and certainly no blood.

My penis is generally more sensitive than usual at the head, it feels slightly uncomfortable when I squeeze it, or when I get hard. The only other salient piece of information might be that the pain really began after I masturbated (nothing overly athletic!) on Monday eve.

What is the likely cause here? Since all the infection/STD tests are negative, is it likely to be a tissue injury? Is there something I have not considered? I Googled 'is it possible to break your penis?' Given my situation, this has alarmed me.

Your advice appreciated!

p.s. I have excellent private medical insurance.