Lower Back Pain (rt side) Same place.

I posted my concern yesterday that I was having pain in my lower back (right said) on which couple of doctors suggested to see a Urologist at the earliest as I am flying out of India on Wednesday evening. I saw a Urologist yesterday and doctor suggested to start the treatment step by step and revisiting the situation on Tuesday and gave me medicines post seeing Urine routine report in which the pus cells were 8-10 and RBC were 1-2. I started my medication yesterday but since morning I was feeling a lot of pressure but was only able to urinate A bit! And the pain again started at the same place. thanks Post this the Dr reco KBU. Which I undergone today afternoon and found a 3mm stone. I had soda and water and after an hour I urinated a lot with pressure. Now I have urinated 5-6 times (as I am consuming 1ltr water every hour and the pressure also seems okay. But a mild pain is still there in the back (rt side) is it normal? Please advice.