What could cause on and off sharp spot lrqabdominal pain and very minor swelling for months. got an ultrasound and blood tests that came back normal. ?

Could be Ovarian: If appendicitis has been ruled out with US, most likely cause of lower quadrant intermittent pain can be from an ovarian cyst. See an oB doctor for an evaluation. Constipation should always be considered as a cause of lower abdominal pains.

Ovulation?: If the pain occurs near the area of your ovaries approximately 2 weeks before you period, it could be an indication of ovulation. If pelvic ultrasound was normal, you may want to see your doctor when symptoms are present

Likely gynecologic: if you are a young woman then persistent right lower quadrant pain is more likley to be gynecologic than gastrointestinal. With right lower quadrant abdominal pain the first thing that needs to be ruled out is appendicitis however but this is highly unlikely given the time course. Sometimes a C scan will be warranted for further evalation