I had similar problem, severe stomach pain and rib pain. I went to my family doctor, they said I had rib out of place. and sent me for blood test. I went to Emergency Room at Hospital and said I had pain, They found the problem, Ulcers in my lower intestine. Dont Delay, Go to ER, they will find the problem. Pain is not normal. Could be many things.
How long has she been in pain ? Did her physician order an MRI ?