I Have Had Problems Urinating A Constant Stream, I Am

I have had problems urinating a constant stream, I am 51 with high blood pressure, recently started on a cpap have had sleep apnea for years now. Acid refulx has gone down since cpap. last couple weeks to a month when I gotta pee i gotta pee and just a little out. I know I have an enlarged prostate psa was normal about 4 months ago. saturday noticed blood in semen. talked to doc he said to see a urologist. what symptoms would be happening if it were prostate cancer? YYYY@YYYY thanks.twee