Strange Stuck/Tingling Feeling in the Tip of Urethra

[JohnF97643]

For the past 8  months I have been experiencing some uncomfortable symptoms which I have not been able to resolve. 8 months ago I had unprotected vaginal sex. About a week later I felt a strange stuck feeling in the tip of penis which was relieved by urinating but would come back about 15 minutes later. I also experienced some discomfort urinating as well. Like there was something obstructing my urine flow. I went to my doctor a week after symptoms started showing and was tested for gonnorhea and chlamydia.  Both tests came back negative. Additionally, a friend of mine had unprotected sex with this woman and had an STD test done when I told him of the symptoms I'm having. His tests came back negative too. I was also prescribed bactrim for a possible UTI. I was then referred to a urologist. I had my prostate examined and was prescribed cipro for prostatitis, which did not provide any relief. Afterward, I had another chlamydia and gon test done and it came back negative again. Since the cipro did not help, I was prescribed celebrex which did not provide any relief. The next visit to my urologist, he performed a cystoscopy and could not find anything abnormal. He then provided a bladder control medication to see if that helped. Nothing. By this point I am very confused about what is causing this problem and my doctor does not seem to know either. The symptoms are often better in the morning, and get progressively worse throughout the day. In addition to the stuck/tinging feeling in the tip of my penis, I sometimes experience aching testicles and pelvic pain. I also sometimes have a forked stream when I begin urinating and dribbling after. Ejaculating sometimes appears to be split, with small amounts coming out of the underside or my urethra and the semen appears bubbly. Sometimes, but not always, ejaculating makes the symptoms go away, but the next time I urinate they come back after about 15 minutes. When I am experiencing symptoms (which is pretty much all the time) if I squeeze the tip of my penis the pain/discomfort gets worse. I know these are a ton of symptoms but any help or insight would be greatly appreciated. Even something to steer my urologist in the right direction since he seems pretty much stumped at this point. Thanks.

Another thing I should add. If I hold my bladder for a long period of time, the symptoms go away. For example, if I do not urinate for about two hours the symptoms are barely noticeable. However, as soon as I urinate, the symptoms return about 10 minutes later.