There are many causes of lower abdominal pain which can range from benign and easily treated conditions, to more serious and potentially fatal diagnoses. From a gastrointestinal viewpoint, examples of the former include irritable bowel syndrome, while more dangerous causes include acute appendicitis, inflammatory bowel disease or bowel obstruction.
From your brief description of symptoms and its association with urinary frequency and backache, the cause of your pain may also originate from the urinary tract instead of the gastrointestinal tract. One possibility is renal stones, although the pain experienced is usually quite severe. If you are female, pelvic pathology such as ovarian cysts may also give rise to right lower abdominal pain.
I would suggest seeking a formal consultation with a GP, Gastroenterologist or Urologist, where a more detailed history will be sought from you.
Together with some basic investigations, I am sure a definitive diagnosis will be reached.
Hope you feel better soon!
