I Have A Cramp In My Side Almost Everyday. It

I have a cramp in my side almost everyday. It feels like a runners cramp but I'm not a runner.I've had an ultrasound and a cat scan and a mir all showing nothing. But its been two years of the pain. It starting morning while I'm doing my hair. If I stretch it will subside. And it never last all day. Sometimes just walking will make it happen. Any ideas?