I'm having major pain in right side of stomach(mainly in my side) between ribs and hip and it goes to my back. ideas what it could be or what to do?

Some possibilities: If one has very uncomfortable tummy pain, and is normally in good health, plus is not pregnant, the possibilities include: appendicitis (usually has fever), gall stones, kidney stone (very painful), constipation (crampy), stomach flu, etc... Most people with "moderate pain", meaning more than mild pain, need a doctor's evaluation to be sure it is not appendicitis, which would need surgery.