I'm a nineteen year old girl. A few days ago, I started experiencing over-all mild, lower back pain. I have back problems, so I just got out the heating pad and didn't pay much attention. But the pain didn't go away and it's been getting worse. It had become concentrated in my lower back to the right side of my spinal cord, right over my hip. Sometimes it does hurt in the right side of my abdomen and in the middle of my back, too. I'm 99% sure it's my kidney. I thought it might be a kidney infection of stone, but I have no pain or increased frequency urinating. In fact, nothing has changed about my urinating habits at all. Could it still be a stone or infection? The pain is constant and a sort of hot pain with sharp twinges every now and then.