Thank you for the query.
The symptoms you have mentioned does not sound like a cancer. Bad smelly stools can be caused by pancreas disease, IBS or diet. Right lower abdominal pain
if is severe can be caused by ovarian cyst
or urinary tract
inflammation. I suggest you to have some tests: abdominal ultrasound, urine analysis, full blood work with liver and pancreas tests, stool tests and transvaginal ultrasound
And you definitely should have colonoscopy
repeated (it is advisable to have colonoscopy repeated after a 5 years of small polyp removal).
If all tests will be negative, you may suffer from IBS. Therefore Rifaximine 400mg 3x1 during 7 days and Mebeverine 200 mg once a day can be helpful (should be prescribed by your doctor).
Hope this will help.