Have you been to the Dr. yet. It is possible that these symptoms are linked, but also very likely that they are not. Kidney pain usually suggests infection or kidney stones. Infection is serious, and would get quickly worse, and include fever, and other ill feelings. Kidney stones may cause stabbing pains or constant aches or both. The pain is worse if the stone is moving. You may also be chronically dehydrated. This would cause kidney pain, though probably less severe. It would also cause constipation. Alcohol is dehydrating as well, and would make things worse. It is also bad for your kidneys in general. Chronic dehydration can also cause kidney stones.
The solution: Drink a lot of water. NO coffee, No caffeine of any kind, NO soda pop, NO alcohol, NO Smoking. All of these things encourage dehydration, and stone formation. If you think you may have kidney stones, go to the Dr. and ask for an IVP test. This is a contrast x-ray of your kidneys.
Are you a nurse or doctor?? You seem to have an answer for everything?? Just curious how you are so knowledgable in the medical feild??