. just a little not even a pea size. i want to know what can this be. I got tested for Chlamydia and Gonorrhea, but it was negative. when i urinate, there are little white mucus strings in my urine
Urine testing for yeast isn't accurate, and probably wasn't done.
One of the common symptoms of prostate inflammation is the mucousy stuff you describe, and since your gonorrhea and chlamydia tests came back negative, it would be a logical next step.