I Was Experiencing Pain In My Lower Back On My

I was experiencing pain in my lower back on my right side. I tried using a heating pad, because that helps, but this time it didn't. I tried to work through it at work, but it was too difficult. I am home now and am in bed. The last time I had this pain, it was my kidney and was due to my not drinking enough water. At the time (some years ago) it worked. I am home recuperating and drinking water, not juice or soda. No change in my urine, no foul odor either.