I'm a relatively healthy 32 year old male. Over the past few months, I experience a dull ache pain below my belly button during ejaculation, after ejaculation the pain stops and I feel nothing. Over the past 5 years, I've suffered from low back pain, according to my doctor, in the sacroiliac region..I suffered this injury weight lifting years ago and its turned into a chronic condition. I was prescribed physical therapy but I never went and now the condition is worse. Anyway, my main concern is the pain during ejacualtion, this developed just recently, i feel like I might have a prostate problem or cancer because the symptoms suggest pain during ejaculation and back pain. I don't have any pain during urination, everything is normal, however I do sometimes have a stong urge to urinate but I do drink alot of fluids during the day, alot of diet soda. Anyway, my doctor said that I most likely don't have prostate cancer and its probably from back, my muscles in that region are always spasaming and cause me pain...he told me not to worry but I am, I don't know..should I see a urologist? Thanks for your help.