Consistent/continuous testicle pain

Hi,
I started feeling pain in both my testicles around 10 days back. I went to doctor immediately and he gave me some antibiotic injections. Immediately the pain went away. He also prescribed me some pain killers and antibiotic tablets and asked me to have for 3 days.

Every thing was fine till 5th day and again I started feeling the pain. I went to another doctor and he suggested me to have the same tablets for one more week. But for some reasons, I still feel some mild pain in both my testicles.

Doctor said the pain is due to Urinary infection.

Testicles are not swollen. They are looking absolutely normal except for the pain.

Why is my pain consistent? How long it takes for Urinary infection to get cured?