Never Ending Discharge.. Please Help.

Hello, i’ve been having a problem and I looked into it very much and cannot understand it. I am a 25 year old white male. About 10 months ago I had unprotected sex with a girl who then told me she thought she had gonorrhea, well she was tested and they came up negative for gonorrhea and chlamydia. But they said that she had bacteria vaginosis. I then developed a slight tingling in my urethra and minor discomfort while urinating. I then was tested and all tests were negative and I was treated anyway with doxycyline and anther antibiotic that was only 2 pills. The symptoms seemed to slowly disappear then after a few more weeks they came back. Now I had not been sexually active still since the first. Now once again I had a slight burning when I urinate and a clear sticky discharge that would just seem to subtly leak out during the course of the day- not pre ejaculation. I was then tested by a different doctor and of course they were negative. I was wishing I came up positive for gonorrhea or chlamydia just so I would no what I had but that wasn’t the case. He gave me cipro and metronidazole. It cleared up. But now its like 9 months later (still no sex, oral, or any contact with anyone else) and for the past month and a half it gradually came back. I have not been sexually active at all, I am very clean and I shower every day. I have not changed any soap that I use to wash with and I have not had any changes in my diet. These are my exact symptoms: I feel discomfort in my penis. I can feel fluid leaking out throughout the day. Although not much it causes the lint from my underwear to stick to the tip of my penis. When I urinate it has a mild burning sensation throughout the urethra. When I masturbate it intensifies, the discharge is more eminent and the burning is not painful at all but definitely there. I can look at my penis at any time of the day and if there is no clear fluid I can kind of squeeze the head of my penis and see it seep out. Now I have been tested 2x nine months ago all negative. As stated above, I have been treated with various drugs that were taken exactly as prescribed. What went wrong? Is there anything that I have that may not be curable? I searched high and low and I cannot find anything that these symptoms would be other than the following: gonorrhea, chlamidia, trichomoniasis (i have been tested and treated for those 2x). I doubt it is rieter’s syndrome, I have no arthritis or redness of the eyes. Maybe non-specific urethritis, but wouldn’t that have cleared up with all of the medication that I have been treated with previously? And trust me I am not going out of my mind, I am not overly stressed, that’s why I have not ran back to the doctor. So its not my brain that’s causing these things to happen either. But I am very concerned. I will admit that I am afraid of meeting someone of the opposite sex, I know I cannot perform until this is resolved. I am very confused and I am reluctant to see the doctor for a 3rd time. But after its slow comeback, it has not gotten any less. I wish, whatever it is, would take its course. I don’t want to have another episode of negative tests and antibiotics that serves more or less to relieve stress then the actual problem I have. Please help. Thanks.