Paining penis, urge pee, panic bcz leave

Im having consistent pain after erection.And pain stays. I consulted eurologist, he adviced urine culture. And found no organism.Then ultrasound. In ultasound there's stone in prostate region.I thought the causative of pain is this stone.Doctor wasn't available the next day so I consulted a syrgeon,he prescribed medicine for stone for10 days.but the problem exists.So visited the eurologist again"But the doctor is damn sure that it's just calcification.And neglecting my case As the size is less"Then today,consulted another famous urologist in my area He prescribed "mebeverine tablets ip" For 14 days.Right now I'm having pain as medium burning in pain.I'm consuming plenty of water approx 3 litres a day from last 2 week.But problem exists.I have other problems like constipation and fissure.And I enquired doctor about cistoscopy,first doctor neglected me,second one told to wait for 14 dys.need to know the reason of my pain,is this stone or calcification.my leave is ending,I'm policetrainee