The various possibilities which present with such pain in the lower right abdomen are appendicitis, Crohn’s disease and ulcerative colitis, bowel obstruction, ovarian cysts and pelvic inflammatory disease( in females),irritable bowel syndrome , kidney obstruction or pyelonephritis, psoas abscess and volvolus (twisting of the sigmoid part of the large bowel on itself).
Investigations like ultrasound abdomen, CT abdomen and colonoscopy are required to confirm a diagnosis. My advice is to consult a gastroenterologist and discuss these possibilities with him.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. Treatment can be started only when the diagnosis is confirmed. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.