I have been suffering from aching pains at groin, penineum, abdomen, upper thigh and lower back areas for 3 months, more severely on the left. It was a strange tingling feeling in my buttock, penineum and the back of my upper thigh at the very beginning. I was suspecting that I got STD, I went to see my GP and he prescribed Vibramycin x 2 for 10 days at the same time did the urine tests for Chlamydia, Gonorrhea,as well as urine culture and urinalysis for me. The result all came out negative. After the 3 day I had taken Vibramycin I found a lot of small bubbles floating on my urine, especially the morning first one(even I used a sitting position, I am sure it's not caused by force). I was scared so after then I have done digital rectal exams(2 times), scrotal and transrectal ultra sound scans and one more chlamydia as well as urine culture and nothing was found. I also got painful erection at night (for 3 nights) around one month after one month I felt the pain, after then my urine stream seems slower and I feel more in frequency and urgency. Urologist says I have nothing wrong as my prostate is small but the pain persists. I have a few questions:
1) The chlamydia tests were urine tests done by TMA technique. Is it a reliable and sensitive test?
2) Is it possible that it is prostatitis caused by STD but the bacteria is hiding somewhere that nothing is found in my urine?
3) Is it possible that it is prostatitis even I have a prostate in normal size and appearance?
4) What would cause foamy urine? Is it possible that it's a reaction to Vibramycin?
I appreciate your advice. Thank you so much!