Though my STD results are negative, I have minor discomfort and weak bladder. Why?

Hi doctor,

I have been trying to speak with a urologist after many STD screenings. All my tests have come back negative, yet the symptoms I face says otherwise. I have had three different screenings since last year. I suffer from discomfort (minor pain), and a weak bladder (urinating often). That comes and goes, even as I write this I face these issues. Because of my worry, I have taken a lot of precautionary medication ahead of results and then the results come back negative. I am treated for everything from Trichomonas to HIV. Please help.

Thank you doctor,

I have taken only antibiotics. I also take Finasteride. I do not believe I have done a pH test of the urine, only STD tests which are all negative. I say weak bladder because I am frequently urinating and when I hold, it usually makes the other symptoms worse until I have gone to the restroom. Most common symptoms are urethra is tender, very tender. A simple touch can trigger the nerves, as well as a continued throbbing sensation and frequent urination.