Talk to Urologist on Erection Disfunction Nd Bit Pain Under The Testicle

Its more then 4 months now i have erection disfunction issue nd pain under the balls part.. I have consult with urologist ultrasound or testicles ka doopler ultrasound bhi hua hai jahan mild infection show huai medicines di for one month but 2 weeks use karne k bad bhi issue resolve nahi hua to neurologist ko dikhaya to he said k nerve issue hai MRI karwaya L3 L4 main bulge show hua medicines di exercises batai.. Magar meri sex abhi tak theek nahi huai i really dont know what to do now kabhi erection aajata hai magar woh zyada time tak nahi erect reh sakta plz guide me