Unless you're deviously gay, you're not going to like my answer.
Go see a doctor, he will place his fingers inside your rectum as far as he can and then press down with pressure. If it very painful, you have prostate problems. If you feel no pain when he presses down, then you are OK and healthy.
A doctor did that to me once, and I came home and pleasured myself.
Bottom-line, go see a doctor.
trouble with urination and bowel movement.
your discomfort is in your gastrointestinal tract or your pancreas.
your too young for your prostate to be dysfunctional
fish dude, the only way to tell for sure! lol