Hi,
Welcome to the forum and I am glad to help you out. Your concern is regarding the lower abdominal cramps that you are having. There can be many reasons for such cramps.
It can be due to inflammatory bowel disease, bowel obstruction, ovarian cysts and pelvic inflammatory disease, irritable bowel syndrome , kidney obstruction or pyelonephritis, psoas abscess and volvulus (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. I sincerely hope that helps. Take care.