pain in right kidney area no pain passing water

Ok this has been going on for about two years now, was diagnosed everything from sciatica to pulled muscle till i stood up and asked for search, gall stones found and then removed along with gall bladder . told this should do the trick. no kidney stones found. pain back after operation and still no reason given , urine test showed borderline infection. am now awaiting results of second urine test.
i have paid privately for soft tissue damage just in case it was the result of the gallstones but this has not helped.
am drink lots of water and this does ease some pain, however this also means i cannot go walking the dogs as need to pass water more frequently.
can anyone suggest an answer to this long term problem that i can throw at the doctor when i see him again next week. thank you. annie