"I had unprotected oral sex just over a week ago. After 3 days I had a yellow discharge from my penis. I went to the walk in clinic that day. They gave me a shot and medicine for gonorreha & chlamyda. They also tested me for both and the test came back negative. The yellow discharge went away soon after the meds. It's been over a week and when I get an erection I have a clear muscus discharge, but not when flaccid. It does not hurt when I urinate, but I have discomfort what feels like in my urethra when just sitting around. It's not constant, it just comes and goes. What could this be? I am still worried about an STD, should I be worried?"