I have right constant dull ache on right and left side under the ribs, flatulence and back pain, upper and lower what could this be?

Many possibilities..: Finding out the cause of abdominal pain is like solving a mystery: we collect clues from one's symptoms, history, examination+/- tests. Therefore, a "hands-on" eval is critical. In general, causes of abdominal pain can include irritable bowel, diverticular disease, endometriosis, ovarian cysts, intestinal or gynecologic cancers, urinary tract infections, etc...