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Since the pelvic examination is normal, conditions like pelvic inflammatory disease, diseases of the ovary, fallopian tubes or the bladder can be ruled out.
In such a situation the other causes of your pelvic pain can include - inflammatory bowel diseases, diverticulitis, Colitis, intraabdominal abscesses, chronic appendicitis, renal stones, etc.
The best way ahead would be to consult your doctor for a examination and tests including stool examination, urinalysis, and a CT of the abdomen and pelvis, which can help in proper diagnosis.