Is digital prostate exam is enough to roll out prostate cancer

Patient: I’m 30 years old male, recently diagnosed with prostatitis, the only test done was a digital prostate exam, my question, is this test enough to roll out the possibility of prostate cancer ? or should I investigate more ? I should mention the test done by a urologist

Symptoms: Difficulty urinating ,dribbling
difficulty starting stream
back pain
slightly swollen hands and feet

Doctor: