I have been having pain in my back on the left side, but know pain is not there. the pain is on my left side all the way to my naval and then just below the naval. It is not consistent pain, but it has been there for 3 weeks or more along with nausea every day, but no vomiting. My specific gravity was 1030. My doctor states I have kidney stones. No blood in urine, just the discomfort, mostly at night. How long will it take to pass it? No CT scan was done.