For the last 5 months I've been experiencing discomfort in the penis - the tip of the penis is red, as is the foreskin. I have some penile discharge - but only after changes in the size of the penis, for instance after arousal. This discharge seems to cause a mild burning sensation at the very tip of the penis.
I have had numerous and repeated tests for STDs (Chlamydia, Gonorrhoea, Adenovirus, Herpes 1+2, Syphilis, Mycoplasma) over these months but they've all been negative; and I've been on three rounds of antibiotics. The antiobiotics have seemingly had no effect.
Any suggestions or similar experiences would be greatly appreciated.