It has been 4 months since my last sexual encounter and I have been dealing with penile problems ever since it happened. I started by getting some irritation at on the penis and what seems like inside the tip of the urethra. This irritation is still going on now, sometimes I don't notice it but sometimes its quite noticeable. With this i have also developed some veins to bulge out more where the shaft meets the penis, and they are bluish in color. I'm not sure what this means but I have been tested for every STD about 3 or 4 times, after the 3 month mark as well, so I do not have an STD, but it is still affected me whatever it is. I have taken a cycles of antibiotics, ciprofloxacin and doxycycline, which have done nothing. So I was wondering if anyone had any insight on my situation?