After trying uva ursi and having the fishy odor coming back, I tried it again while switching off between juniper berry for two weeks like you suggested. That did not work either. The smell went away for a couple weeks and then returned. The problem first started after having unprotected sex one day. I got tested for all stds and they came back negative, and I repeated the tests later with negative results again. What is the reason that both antibiotics and uva ursi failed to rid this infection? What could I do now, having already tried taking uva ursi and juniper berry for two weeks, as well as previously using antibiotics prescribed by my doctor? I followed your protocol perfectly by drinking lots of water and always taking the uva ursi with calcium citrate on an empty stomach or between meals. I really don't want to live with this smell all my life and worry about transmitting an infection or having the infection spread in my own body. What can I do?

One possibility is that you are suffering from trichomonas infection, which is a protozoal infection.  This can cause a fish smell and is often missed by standard testing by microscopic examination.  Culturing is a little more accurate, but can still overlook infections.

And since this infection also infects the female organs even killing the protozoa in the urinary tract does not mean the infection will be gone.  The infection can easily re-infect the urinary tract since the protozoa are still present outside the urinary tract.

My recommendation would be to talk to your doctor about getting treated for trichomonas just in case since this is the most likely culprit.