A couple of days ago I had a pain start in my back, lower right side, seems to be below my ribs but not into my hip area (I have sciatic problems, that was my first guess), the pain is continuing, seems to come and go, feels like a deep, achy, pulling kind of thing. I don't have any pain/blood when urinating though, no fever or other symptoms. Is this a sign of a kidney infection or something like that? Possible stone? I thought I had pulled a muscle or something, but this is a different kind of pain than what I've had before.