Talk to Urologist on Left Side Kidney Pain

I have been suffering from left kidney pain since last 6 months. when i get up in morning, i feel like my kidney is empty and i feel pain in it. Then i drink 2 litre of water and then pain reduces. During the day when my body is excreted then again i start feeling pain and then i again drink 2 litre of water. Same things repeat on daily basis. Throughout the whole day, when my body is excreted, I need to drink more water in order to reduce my left side pain in kidney. I am very worried about it because i am working person and i feel issues in going to toilet again and again during workplace. kindly suggest me suitable advice.